Cetirizine

Generic name: Pronounced as (se ti' ra zeen)
Brand names
  • Aller-Tec
  • Alleroff
  • Zyrtec®
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Medical Content Reviewed By HelloPharmacist Staff

Last Revised - 01/15/2018

Cetirizine is used to temporarily relieve the symptoms of hay fever (allergy to pollen, dust, or other substances in the air) and allergy to other substances (such as dust mites, animal dander, cockroaches, and molds). These symptoms include sneezing; runny nose; itchy, red, watery eyes; and itchy nose or throat. Cetirizine is also used to treat itching and redness caused by hives. However, cetirizine does not prevent hives or other allergic skin reactions. Cetirizine is in a class of medications called antihistamines. It works by blocking the action of histamine, a substance in the body that causes allergic symptoms.

Cetirizine is also available in combination with pseudoephedrine (Sudafed, others). This monograph only includes information about the use of cetirizine alone. If you are taking the cetirizine and pseudoephedrine combination product, read the information on the package label or ask your doctor or pharmacist for more information.

Cetirizine comes as a tablet, a chewable tablet, an extended release tablet, and a syrup (liquid) to take by mouth. It is usually taken once a day with or without food. Take cetirizine at around the same time every day. Follow the directions on your package label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take cetirizine exactly as directed. Do not take more or less of it or take it more often than directed on the package label or as recommended by your doctor.

Do not use cetirizine to treat hives that are bruised or blistered, that are an unusual color, or that do not itch. Call your doctor if you have these types of hives.

Stop taking cetirizine and call your doctor if your hives do not improve during the first 3 days of your treatment or if your hives last longer than 6 weeks. If you do not know the cause of your hives, call your doctor.

If you are taking cetirizine to treat hives, and you develop any of the following symptoms, get emergency medical help right away: difficulty swallowing, speaking, or breathing; swelling in and around the mouth or swelling of the tongue; wheezing; drooling; dizziness; or loss of consciousness. These may be symptoms of a life-threatening allergic reaction called anaphylaxis. If your doctor suspects that you may experience anaphylaxis with your hives, he may prescribe an epinephrine injector (EpiPen). Do not use cetirizine in place of the epinephrine injector.

This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.

Before taking cetirizine,

  • tell your doctor and pharmacist if you are allergic to cetirizine, hydroxyzine (Vistaril), or any other medications.

  • tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Be sure to mention any of the following: antidepressants, medications for anxiety, medications for mental illness, medications for seizures, other medications for cold and allergy, sedatives, sleeping pills, tranquilizers, and theophylline (Theo-24, Theolair). Your doctor may need to change the doses of your medications or monitor you carefully for side effects.

  • tell your doctor if you have or have ever had kidney or liver disease.

  • tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking cetirizine, call your doctor.

  • you should know that cetirizine may make you drowsy. Do not drive a car or operate machinery until you know how this medication affects you.

  • remember that alcohol can add to the drowsiness caused by this medication. Avoid drinking alcoholic beverages while taking this medication.

Unless your doctor tells you otherwise, continue your normal diet.

Take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.

  • Cetirizine may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

    • drowsiness

    • excessive tiredness

    • dry mouth

    • stomach pain

    • diarrhea

    • vomiting

  • Some side effects can be serious. The following symptom is uncommon, but if you experience it, call your doctor immediately:

    • difficulty breathing or swallowing

  • Cetirizine may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.

  • If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online (http://www.fda.gov/Safety/MedWatch) or by phone (1-800-332-1088).

Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom).

It is important to keep all medication out of sight and reach of children as many containers (such as weekly pill minders and those for eye drops, creams, patches, and inhalers) are not child-resistant and young children can open them easily. To protect young children from poisoning, always lock safety caps and immediately place the medication in a safe location – one that is up and away and out of their sight and reach. http://www.upandaway.org

Unneeded medications should be disposed of in special ways to ensure that pets, children, and other people cannot consume them. However, you should not flush this medication down the toilet. Instead, the best way to dispose of your medication is through a medicine take-back program. Talk to your pharmacist or contact your local garbage/recycling department to learn about take-back programs in your community. See the FDA's Safe Disposal of Medicines website (http://goo.gl/c4Rm4p) for more information if you do not have access to a take-back program.

In case of overdose, call the poison control helpline at 1-800-222-1222. Information is also available online at https://www.poisonhelp.org/help. If the victim has collapsed, had a seizure, has trouble breathing, or can't be awakened, immediately call emergency services at 911.

Symptoms of overdose may include:

  • restlessness

  • irritability

  • drowsiness

Keep all appointments with your doctor.

Ask your pharmacist any questions you have about cetirizine.

It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.

  • Aller-Tec-D (containing Cetirizine, Pseudoephedrine)
  • Citiri-D (containing Cetirizine, Pseudoephedrine)
  • Wal Zyr D (containing Cetirizine, Pseudoephedrine)
  • Zyrtec-D® (containing Cetirizine, Pseudoephedrine)

Drug Interaction
Moxifloxacin Moxifloxacin The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Moxifloxacin.
Dolasetron Dolasetron The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Dolasetron.
Anagrelide Anagrelide The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Anagrelide.
Cilostazol Cilostazol The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Cilostazol.
Diphenoxylate Diphenoxylate The risk or severity of adverse effects can be increased when Cetirizine is combined with Diphenoxylate.
Erythromycin and Sulfisoxazole Erythromycin and Sulfisoxazole The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Erythromycin.
Estrogen and Progestin (Oral Contraceptives) Estrogen and Progestin (Oral Contraceptives) Conjugated estrogens may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Fenofibrate Fenofibrate Cetirizine may decrease the excretion rate of Fenofibrate which could result in a higher serum level.
Guanfacine Guanfacine The risk or severity of adverse effects can be increased when Cetirizine is combined with Guanfacine.
Magnesium Hydroxide Magnesium Hydroxide Cetirizine may decrease the excretion rate of Magnesium hydroxide which could result in a higher serum level.
Mycophenolate Mycophenolate Cetirizine may decrease the excretion rate of Mycophenolic acid which could result in a higher serum level.
Naratriptan Naratriptan The risk or severity of adverse effects can be increased when Cetirizine is combined with Naratriptan.
Olsalazine Olsalazine Olsalazine may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Paregoric Paregoric The risk or severity of adverse effects can be increased when Morphine is combined with Cetirizine.
Penbutolol Penbutolol The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Acebutolol.
Pentazocine Pentazocine The risk or severity of adverse effects can be increased when Cetirizine is combined with Pentazocine.
Potassium Potassium Potassium may increase the excretion rate of Cetirizine which could result in a lower serum level and potentially a reduction in efficacy.
Prednisone Prednisone Cetirizine may decrease the excretion rate of Prednisone which could result in a higher serum level.
Ranitidine Ranitidine Cetirizine may decrease the excretion rate of Ranitidine which could result in a higher serum level.
Reserpine Reserpine The risk or severity of adverse effects can be increased when Reserpine is combined with Cetirizine.
Rizatriptan Rizatriptan The risk or severity of adverse effects can be increased when Cetirizine is combined with Rizatriptan.
Sumatriptan Sumatriptan The risk or severity of adverse effects can be increased when Cetirizine is combined with Sumatriptan.
Tacrolimus Tacrolimus Tacrolimus may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Tizanidine Tizanidine The risk or severity of adverse effects can be increased when Cetirizine is combined with Tizanidine.
Zolmitriptan Zolmitriptan The risk or severity of adverse effects can be increased when Zolmitriptan is combined with Cetirizine.
Ampicillin Injection Ampicillin Injection Cetirizine may decrease the excretion rate of Ampicillin which could result in a higher serum level.
Doxycycline Injection Doxycycline Injection Doxycycline may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Famotidine Injection Famotidine Injection The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Famotidine.
Fluconazole Injection Fluconazole Injection The risk or severity of QTc prolongation can be increased when Fluconazole is combined with Cetirizine.
Foscarnet Injection Foscarnet Injection Foscarnet may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Hydromorphone Injection Hydromorphone Injection The risk or severity of adverse effects can be increased when Hydromorphone is combined with Cetirizine.
Levofloxacin Injection Levofloxacin Injection The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Levofloxacin.
Meperidine Injection Meperidine Injection The risk or severity of adverse effects can be increased when Cetirizine is combined with Meperidine.
Metoclopramide Injection Metoclopramide Injection The risk or severity of sedation can be increased when Cetirizine is combined with Metoclopramide.
Metronidazole Injection Metronidazole Injection The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Metronidazole.
Morphine Injection Morphine Injection The risk or severity of adverse effects can be increased when Morphine is combined with Cetirizine.
Pamidronate Injection Pamidronate Injection Pamidronic acid may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Vancomycin Injection Vancomycin Injection Cetirizine may decrease the excretion rate of Vancomycin which could result in a higher serum level.
Altretamine Altretamine Amphetamine may decrease the sedative and stimulatory activities of Cetirizine.
Cefuroxime Cefuroxime Cefuroxime may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Cyclosporine Cyclosporine Cyclosporine may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Ondansetron Ondansetron The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Ondansetron.
Granisetron Granisetron The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Granisetron.
Torsemide Torsemide Torasemide may increase the excretion rate of Cetirizine which could result in a lower serum level and potentially a reduction in efficacy.
Olanzapine Olanzapine The risk or severity of adverse effects can be increased when Olanzapine is combined with Cetirizine.
Alosetron Alosetron The risk or severity of adverse effects can be increased when Cetirizine is combined with Alosetron.
Dofetilide Dofetilide The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Dofetilide.
Entacapone Entacapone The risk or severity of adverse effects can be increased when Cetirizine is combined with Entacapone.
Hydroxychloroquine Hydroxychloroquine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Hydroxychloroquine.
Meloxicam Meloxicam Meloxicam may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Oxcarbazepine Oxcarbazepine The risk or severity of adverse effects can be increased when Cetirizine is combined with Oxcarbazepine.
Pantoprazole Pantoprazole Pantoprazole may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Temozolomide Temozolomide Cetirizine may decrease the excretion rate of Temozolomide which could result in a higher serum level.
Zaleplon Zaleplon The risk or severity of adverse effects can be increased when Cetirizine is combined with Zaleplon.
Desloratadine Desloratadine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Desloratadine.
Linezolid Linezolid The risk or severity of adverse effects can be increased when Cetirizine is combined with Linezolid.
Trimipramine Trimipramine The risk or severity of adverse effects can be increased when Cetirizine is combined with Trimipramine.
Glycopyrrolate Glycopyrrolate Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Glycopyrronium.
Perindopril Perindopril Cetirizine may decrease the excretion rate of Perindopril which could result in a higher serum level.
Tenofovir Tenofovir Tenofovir may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Choline Magnesium Trisalicylate Choline Magnesium Trisalicylate Choline magnesium trisalicylate may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Epinephrine Injection Epinephrine Injection The therapeutic efficacy of Epinephrine can be increased when used in combination with Cetirizine.
Eplerenone Eplerenone Eplerenone may increase the excretion rate of Cetirizine which could result in a lower serum level and potentially a reduction in efficacy.
Escitalopram Escitalopram The risk or severity of adverse effects can be increased when Cetirizine is combined with Escitalopram.
Zonisamide Zonisamide The risk or severity of adverse effects can be increased when Cetirizine is combined with Zonisamide.
Aripiprazole Aripiprazole The risk or severity of adverse effects can be increased when Cetirizine is combined with Aripiprazole.
Atomoxetine Atomoxetine The risk or severity of adverse effects can be increased when Atomoxetine is combined with Cetirizine.
Dexmethylphenidate Dexmethylphenidate The risk or severity of adverse effects can be increased when Cetirizine is combined with Dexmethylphenidate.
Atazanavir Atazanavir Atazanavir may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Almotriptan Almotriptan The risk or severity of adverse effects can be increased when Cetirizine is combined with Almotriptan.
Eletriptan Eletriptan The risk or severity of adverse effects can be increased when Eletriptan is combined with Cetirizine.
Mefloquine Mefloquine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Mefloquine.
Vardenafil Vardenafil The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Vardenafil.
Alfuzosin Alfuzosin The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Alfuzosin.
Emtricitabine Emtricitabine Cetirizine may decrease the excretion rate of Emtricitabine which could result in a higher serum level.
Memantine Memantine Cetirizine may decrease the excretion rate of Memantine which could result in a higher serum level.
Tadalafil Tadalafil Cetirizine may decrease the excretion rate of Tadalafil which could result in a higher serum level.
Frovatriptan Frovatriptan The risk or severity of adverse effects can be increased when Cetirizine is combined with Frovatriptan.
Gemifloxacin Gemifloxacin The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Gemifloxacin.
Apomorphine Injection Apomorphine Injection The risk or severity of adverse effects can be increased when Cetirizine is combined with Apomorphine.
Protriptyline Protriptyline The risk or severity of adverse effects can be increased when Cetirizine is combined with Protriptyline.
Duloxetine Duloxetine The risk or severity of adverse effects can be increased when Cetirizine is combined with Duloxetine.
Tinidazole Tinidazole Cetirizine may decrease the excretion rate of Tinidazole which could result in a higher serum level.
Trospium Trospium Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Trospium.
Cefditoren Cefditoren Cetirizine may decrease the excretion rate of Cefdinir which could result in a higher serum level.
Cyanocobalamin Injection Cyanocobalamin Injection Hydroxocobalamin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Erlotinib Erlotinib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Erlotinib.
Eszopiclone Eszopiclone The risk or severity of CNS depression can be increased when Cetirizine is combined with Eszopiclone.
Ganciclovir Ganciclovir Cetirizine may decrease the excretion rate of Ganciclovir which could result in a higher serum level.
Ribavirin Ribavirin Cetirizine may decrease the excretion rate of Ribavirin which could result in a higher serum level.
Solifenacin Solifenacin Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Solifenacin.
Valganciclovir Valganciclovir Cetirizine may decrease the excretion rate of Valganciclovir which could result in a higher serum level.
Voriconazole Voriconazole The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Voriconazole.
Adefovir Adefovir Adefovir may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Dextroamphetamine Dextroamphetamine Amphetamine may decrease the sedative and stimulatory activities of Cetirizine.
Sodium Oxybate Sodium Oxybate Sodium oxybate may increase the central nervous system depressant (CNS depressant) activities of Cetirizine.
Ibandronate Ibandronate The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Ibandronate.
Isocarboxazid Isocarboxazid The risk or severity of adverse effects can be increased when Cetirizine is combined with Isocarboxazid.
Ramelteon Ramelteon The risk or severity of adverse effects can be increased when Cetirizine is combined with Ramelteon.
Darifenacin Darifenacin Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Darifenacin.
Fentanyl Fentanyl The risk or severity of adverse effects can be increased when Cetirizine is combined with Fentanyl.
Pregabalin Pregabalin The therapeutic efficacy of Cetirizine can be increased when used in combination with Pregabalin.
Felbamate Felbamate The risk or severity of adverse effects can be increased when Cetirizine is combined with Felbamate.
Ranolazine Ranolazine The risk or severity of QTc prolongation can be increased when Ranolazine is combined with Cetirizine.
Rasagiline Rasagiline The risk or severity of adverse effects can be increased when Cetirizine is combined with Rasagiline.
Imatinib Imatinib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Imatinib.
Sitagliptin Sitagliptin Cetirizine may decrease the excretion rate of Sitagliptin which could result in a higher serum level.
Varenicline Varenicline Cetirizine may decrease the excretion rate of Varenicline which could result in a higher serum level.
Albuterol Albuterol The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Salbutamol.
Paliperidone Paliperidone The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Paliperidone.
Bortezomib Bortezomib The risk or severity of QTc prolongation can be increased when Bortezomib is combined with Cetirizine.
Clofarabine Injection Clofarabine Injection Cetirizine may decrease the excretion rate of Clofarabine which could result in a higher serum level.
Lubiprostone Lubiprostone Cetirizine may decrease the excretion rate of Lubiprostone which could result in a higher serum level.
Oxaliplatin Injection Oxaliplatin Injection The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Oxaliplatin.
Posaconazole Posaconazole The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Posaconazole.
Primaquine Primaquine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Primaquine.
Pemetrexed Injection Pemetrexed Injection Cetirizine may decrease the excretion rate of Pemetrexed which could result in a higher serum level.
Dimenhydrinate Dimenhydrinate The risk or severity of adverse effects can be increased when Cetirizine is combined with Dimenhydrinate.
Lisdexamfetamine Lisdexamfetamine Lisdexamfetamine may decrease the sedative and stimulatory activities of Cetirizine.
Nabilone Nabilone Nabilone may increase the central nervous system depressant (CNS depressant) activities of Cetirizine.
Vorinostat Vorinostat The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Vorinostat.
Sorafenib Sorafenib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Sorafenib.
Sunitinib Sunitinib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Sunitinib.
Dronabinol Dronabinol Dronabinol may increase the central nervous system depressant (CNS depressant) activities of Cetirizine.
Lapatinib Lapatinib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Lapatinib.
Levocetirizine Levocetirizine The risk or severity of adverse effects can be increased when Cetirizine is combined with Levocetirizine.
Pegaptanib Injection Pegaptanib Injection Cetirizine may decrease the excretion rate of Pegaptanib which could result in a higher serum level.
Dasatinib Dasatinib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Dasatinib.
Azacitidine Injection Azacitidine Injection Cetirizine may decrease the excretion rate of Azacitidine which could result in a higher serum level.
Lenalidomide Lenalidomide Cetirizine may decrease the excretion rate of Lenalidomide which could result in a higher serum level.
Nilotinib Nilotinib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Nilotinib.
Toremifene Toremifene The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Toremifene.
Budesonide Budesonide Cetirizine may decrease the excretion rate of Budesonide which could result in a higher serum level.
Desmopressin Desmopressin Desmopressin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
OnabotulinumtoxinA Injection OnabotulinumtoxinA Injection The risk or severity of adverse effects can be increased when Botulinum toxin type A is combined with Cetirizine.
RimabotulinumtoxinB Injection RimabotulinumtoxinB Injection The risk or severity of adverse effects can be increased when Botulinum Toxin Type B is combined with Cetirizine.
Doripenem Injection Doripenem Injection Cetirizine may decrease the excretion rate of Doripenem which could result in a higher serum level.
Arsenic Trioxide Injection Arsenic Trioxide Injection The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Arsenic trioxide.
Desvenlafaxine Desvenlafaxine The risk or severity of adverse effects can be increased when Cetirizine is combined with Desvenlafaxine.
Cevimeline Cevimeline Cevimeline may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Flecainide Flecainide The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Flecainide.
Certolizumab Injection Certolizumab Injection Cetirizine may decrease the excretion rate of Certolizumab pegol which could result in a higher serum level.
Daptomycin Injection Daptomycin Injection Daptomycin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Methylnaltrexone Injection Methylnaltrexone Injection Cetirizine may decrease the excretion rate of Methylnaltrexone which could result in a higher serum level.
Rufinamide Rufinamide The risk or severity of adverse effects can be increased when Rufinamide is combined with Cetirizine.
Midazolam Midazolam The risk or severity of adverse effects can be increased when Cetirizine is combined with Midazolam.
Dexrazoxane Injection Dexrazoxane Injection Cetirizine may decrease the excretion rate of Dexrazoxane which could result in a higher serum level.
Milnacipran Milnacipran The risk or severity of adverse effects can be increased when Cetirizine is combined with Milnacipran.
Plerixafor Injection Plerixafor Injection Cetirizine may decrease the excretion rate of Plerixafor which could result in a higher serum level.
Fesoterodine Fesoterodine Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Fesoterodine.
Degarelix Injection Degarelix Injection The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Degarelix.
Betaxolol Betaxolol The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Betaxolol.
Iloperidone Iloperidone The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Iloperidone.
Prasugrel Prasugrel Cetirizine may decrease the excretion rate of Prasugrel which could result in a higher serum level.
Lacosamide Lacosamide The risk or severity of adverse effects can be increased when Cetirizine is combined with Lacosamide.
Tolvaptan (low blood sodium) Tolvaptan (low blood sodium) Tolvaptan may increase the excretion rate of Cetirizine which could result in a lower serum level and potentially a reduction in efficacy.
Dronedarone Dronedarone The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Dronedarone.
AbobotulinumtoxinA Injection AbobotulinumtoxinA Injection The risk or severity of adverse effects can be increased when Botulinum toxin type A is combined with Cetirizine.
Pralatrexate Injection Pralatrexate Injection Cetirizine may decrease the excretion rate of Pralatrexate which could result in a higher serum level.
Palonosetron Injection Palonosetron Injection The risk or severity of adverse effects can be increased when Cetirizine is combined with Palonosetron.
Saxagliptin Saxagliptin Cetirizine may decrease the excretion rate of Saxagliptin which could result in a higher serum level.
Telavancin Injection Telavancin Injection The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Telavancin.
Romidepsin Injection Romidepsin Injection The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Romidepsin.
Tapentadol Tapentadol Tapentadol may increase the central nervous system depressant (CNS depressant) activities of Cetirizine.
Topotecan Topotecan Cetirizine may decrease the excretion rate of Topotecan which could result in a higher serum level.
Pazopanib Pazopanib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Pazopanib.
Asenapine Asenapine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Asenapine.
Vigabatrin Vigabatrin The risk or severity of adverse effects can be increased when Cetirizine is combined with Vigabatrin.
Oxymorphone Oxymorphone The risk or severity of adverse effects can be increased when Cetirizine is combined with Oxymorphone.
Dalfampridine Dalfampridine Cetirizine may decrease the excretion rate of Dalfampridine which could result in a higher serum level.
Eribulin Injection Eribulin Injection The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Eribulin.
IncobotulinumtoxinA Injection IncobotulinumtoxinA Injection The risk or severity of adverse effects can be increased when Botulinum toxin type A is combined with Cetirizine.
Ceftaroline Injection Ceftaroline Injection Ceftaroline fosamil may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Lurasidone Lurasidone The risk or severity of adverse effects can be increased when Cetirizine is combined with Lurasidone.
Acetaminophen Injection Acetaminophen Injection Acetaminophen may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Vilazodone Vilazodone The risk or severity of adverse effects can be increased when Cetirizine is combined with Vilazodone.
Ipilimumab Injection Ipilimumab Injection Cetirizine may decrease the excretion rate of Ipilimumab which could result in a higher serum level.
Denileukin Diftitox Injection Denileukin Diftitox Injection Aldesleukin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Terbutaline Injection Terbutaline Injection The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Terbutaline.
Roflumilast Roflumilast Cetirizine may decrease the excretion rate of Roflumilast which could result in a higher serum level.
Rilpivirine Rilpivirine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Rilpivirine.
Triptorelin Injection Triptorelin Injection The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Triptorelin.
Rivaroxaban Rivaroxaban Cetirizine may decrease the excretion rate of Rivaroxaban which could result in a higher serum level.
Ruxolitinib Ruxolitinib Cetirizine may decrease the excretion rate of Ruxolitinib which could result in a higher serum level.
Vandetanib Vandetanib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Vandetanib.
Clobazam Clobazam The risk or severity of adverse effects can be increased when Cetirizine is combined with Clobazam.
Vemurafenib Vemurafenib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Vemurafenib.
Deferiprone Deferiprone Cetirizine may decrease the excretion rate of Deferiprone which could result in a higher serum level.
Crizotinib Crizotinib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Crizotinib.
Cabergoline Cabergoline The risk or severity of adverse effects can be increased when Cabergoline is combined with Cetirizine.
Naloxone Injection Naloxone Injection Cetirizine may decrease the excretion rate of Naloxone which could result in a higher serum level.
Fondaparinux Injection Fondaparinux Injection Cetirizine may decrease the excretion rate of Fondaparinux which could result in a higher serum level.
Ezogabine Ezogabine The risk or severity of adverse effects can be increased when Cetirizine is combined with Tiagabine.
Enzalutamide Enzalutamide Cetirizine may decrease the excretion rate of Enzalutamide which could result in a higher serum level.
Mirabegron Mirabegron The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Mirabegron.
Teduglutide Injection Teduglutide Injection Cetirizine may decrease the excretion rate of Teduglutide which could result in a higher serum level.
Bedaquiline Bedaquiline The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Bedaquiline.
Alogliptin Alogliptin Cetirizine may decrease the excretion rate of Alogliptin which could result in a higher serum level.
Pomalidomide Pomalidomide The risk or severity of adverse effects can be increased when Cetirizine is combined with Pomalidomide.
Canagliflozin Canagliflozin Cetirizine may increase the excretion rate of Canagliflozin which could result in a lower serum level and potentially a reduction in efficacy.
Methazolamide Methazolamide Methazolamide may increase the excretion rate of Cetirizine which could result in a lower serum level and potentially a reduction in efficacy.
Dabrafenib Dabrafenib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Dabrafenib.
Trametinib Trametinib Cetirizine may decrease the excretion rate of Trametinib which could result in a higher serum level.
Levomilnacipran Levomilnacipran The risk or severity of adverse effects can be increased when Cetirizine is combined with Levomilnacipran.
Ertapenem Injection Ertapenem Injection Ertapenem may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Vortioxetine Vortioxetine The risk or severity of adverse effects can be increased when Cetirizine is combined with Vortioxetine.
Perampanel Perampanel Perampanel may increase the central nervous system depressant (CNS depressant) activities of Cetirizine.
Ketorolac Injection Ketorolac Injection Ketorolac may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Sofosbuvir Sofosbuvir Cetirizine may decrease the excretion rate of Sofosbuvir which could result in a higher serum level.
Dapagliflozin Dapagliflozin Dapagliflozin may increase the excretion rate of Cetirizine which could result in a lower serum level and potentially a reduction in efficacy.
Apremilast Apremilast Cetirizine may decrease the excretion rate of Apremilast which could result in a higher serum level.
Droxidopa Droxidopa The therapeutic efficacy of Droxidopa can be increased when used in combination with Cetirizine.
Ceritinib Ceritinib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Ceritinib.
Eslicarbazepine Eslicarbazepine The risk or severity of adverse effects can be increased when Cetirizine is combined with Eslicarbazepine.
Testosterone Injection Testosterone Injection Cetirizine may decrease the excretion rate of Testosterone which could result in a higher serum level.
Hydrocodone Hydrocodone Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Hydrocodone.
Suvorexant Suvorexant Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Suvorexant.
Edoxaban Edoxaban Cetirizine may decrease the excretion rate of Edoxaban which could result in a higher serum level.
Methamphetamine Methamphetamine Metamfetamine may decrease the sedative and stimulatory activities of Cetirizine.
Tasimelteon Tasimelteon The risk or severity of adverse effects can be increased when Cetirizine is combined with Tasimelteon.
Risperidone Injection Risperidone Injection The risk or severity of adverse effects can be increased when Cetirizine is combined with Risperidone.
Lenvatinib Lenvatinib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Lenvatinib.
Panobinostat Panobinostat The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Panobinostat.
Haloperidol Injection Haloperidol Injection The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Haloperidol.
Ivabradine Ivabradine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Ivabradine.
Amiloride Amiloride Amiloride may increase the excretion rate of Cetirizine which could result in a lower serum level and potentially a reduction in efficacy.
Macitentan Macitentan Cetirizine may decrease the excretion rate of Macitentan which could result in a higher serum level.
Flibanserin Flibanserin The risk or severity of adverse effects can be increased when Cetirizine is combined with Flibanserin.
Brexpiprazole Brexpiprazole The risk or severity of adverse effects can be increased when Cetirizine is combined with Brexpiprazole.
Ziprasidone Injection Ziprasidone Injection The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Ziprasidone.
Cariprazine Cariprazine The risk or severity of adverse effects can be increased when Cetirizine is combined with Cariprazine.
Penicillin G Procaine Injection Penicillin G Procaine Injection Cetirizine may decrease the excretion rate of Procaine benzylpenicillin which could result in a higher serum level.
Ixazomib Ixazomib Cetirizine may decrease the excretion rate of Ixazomib which could result in a higher serum level.
Lesinurad Lesinurad Cetirizine may decrease the excretion rate of Lesinurad which could result in a higher serum level.
Amphotericin B Liposomal Injection Amphotericin B Liposomal Injection Amphotericin B may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Brivaracetam Injection Brivaracetam Injection The risk or severity of adverse effects can be increased when Cetirizine is combined with Brivaracetam.
Pimavanserin Pimavanserin The risk or severity of adverse effects can be increased when Cetirizine is combined with Pimavanserin.
Diphenhydramine Injection Diphenhydramine Injection The risk or severity of adverse effects can be increased when Cetirizine is combined with Diphenhydramine.
Furosemide Injection Furosemide Injection Cetirizine may increase the excretion rate of Furosemide which could result in a lower serum level and potentially a reduction in efficacy.
Lixisenatide Injection Lixisenatide Injection Cetirizine may decrease the excretion rate of Lixisenatide which could result in a higher serum level.
Ribociclib Ribociclib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Ribociclib.
Doxepin (Insomnia) Doxepin (Insomnia) Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Doxepin.
Deutetrabenazine Deutetrabenazine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Deutetrabenazine.
Valbenazine Valbenazine Cetirizine may decrease the excretion rate of Valbenazine which could result in a higher serum level.
Safinamide Safinamide The risk or severity of adverse effects can be increased when Cetirizine is combined with Safinamide.
Naldemedine Naldemedine Cetirizine may decrease the excretion rate of Naldemedine which could result in a higher serum level.
Benznidazole Benznidazole Cetirizine may decrease the excretion rate of Benznidazole which could result in a higher serum level.
Delafloxacin Delafloxacin The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Delafloxacin.
Tetrabenazine Tetrabenazine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Tetrabenazine.
Ertugliflozin Ertugliflozin Ertugliflozin may increase the excretion rate of Cetirizine which could result in a lower serum level and potentially a reduction in efficacy.
Buprenorphine Injection Buprenorphine Injection Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Buprenorphine.
Apalutamide Apalutamide Cetirizine may decrease the excretion rate of Apalutamide which could result in a higher serum level.
Baricitinib Baricitinib Cetirizine may decrease the excretion rate of Baricitinib which could result in a higher serum level.
Lofexidine Lofexidine The therapeutic efficacy of Cetirizine can be increased when used in combination with Lofexidine.
Plazomicin Injection Plazomicin Injection Cetirizine may decrease the excretion rate of Plazomicin which could result in a higher serum level.
Eliglustat Eliglustat The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Eliglustat.
Encorafenib Encorafenib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Encorafenib.
Ivosidenib Ivosidenib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Ivosidenib.
Cannabidiol Cannabidiol The risk or severity of adverse effects can be increased when Cannabidiol is combined with Cetirizine.
Stiripentol Stiripentol The risk or severity of adverse effects can be increased when Cetirizine is combined with Stiripentol.
Gilteritinib Gilteritinib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Gilteritinib.
Glasdegib Glasdegib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Glasdegib.
Prucalopride Prucalopride Cetirizine may decrease the excretion rate of Prucalopride which could result in a higher serum level.
Acyclovir Ophthalmic Acyclovir Ophthalmic Acyclovir may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Brexanolone Injection Brexanolone Injection The risk or severity of adverse effects can be increased when Cetirizine is combined with Brexanolone.
Solriamfetol Solriamfetol The risk or severity of adverse effects can be increased when Cetirizine is combined with Solriamfetol.
Triclabendazole Triclabendazole The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Triclabendazole.
Entrectinib Entrectinib The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Entrectinib.
Pitolisant Pitolisant The therapeutic efficacy of Pitolisant can be decreased when used in combination with Cetirizine.
Lefamulin Lefamulin Cetirizine may increase the QTc-prolonging activities of Lefamulin.
Phenytoin Injection Phenytoin Injection The risk or severity of adverse effects can be increased when Phenytoin is combined with Cetirizine.
Fosphenytoin Injection Fosphenytoin Injection The risk or severity of adverse effects can be increased when Cetirizine is combined with Fosphenytoin.
Lumateperone Lumateperone The risk or severity of adverse effects can be increased when Cetirizine is combined with Lumateperone.
Lasmiditan Lasmiditan The risk or severity of adverse effects can be increased when Cetirizine is combined with Lasmiditan.
Lemborexant Lemborexant The risk or severity of adverse effects can be increased when Cetirizine is combined with Lemborexant.
Daratumumab and Hyaluronidase-fihj Injection Daratumumab and Hyaluronidase-fihj Injection The therapeutic efficacy of Hyaluronidase can be decreased when used in combination with Cetirizine.
Fenfluramine Fenfluramine The risk or severity of adverse effects can be increased when Cetirizine is combined with Fenfluramine.
Fostemsavir Fostemsavir The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Fostemsavir.
Pertuzumab, Trastuzumab, and Hyaluronidase-zzxf Injection Pertuzumab, Trastuzumab, and Hyaluronidase-zzxf Injection The therapeutic efficacy of Hyaluronidase can be decreased when used in combination with Cetirizine.
Octreotide Octreotide The risk or severity of QTc prolongation can be increased when Octreotide is combined with Cetirizine.
Relugolix Relugolix The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Relugolix.
Progestin-Only (drospirenone) Oral Contraceptives Progestin-Only (drospirenone) Oral Contraceptives Drospirenone may increase the excretion rate of Cetirizine which could result in a lower serum level and potentially a reduction in efficacy.
Viloxazine Viloxazine The risk or severity of adverse effects can be increased when Cetirizine is combined with Viloxazine.
Tobramycin Injection Tobramycin Injection Tobramycin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Theophylline Theophylline The serum concentration of Cetirizine can be increased when it is combined with Theophylline.
Fenoprofen Fenoprofen Fenoprofen may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Indomethacin Indomethacin Indomethacin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Mefenamic Acid Mefenamic Acid Mefenamic acid may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Naproxen Naproxen Naproxen may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Tolmetin Tolmetin Tolmetin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Sulindac Sulindac Sulindac may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Trazodone Trazodone The risk or severity of QTc prolongation can be increased when Trazodone is combined with Cetirizine.
Isotretinoin Isotretinoin Cetirizine may decrease the excretion rate of Isotretinoin which could result in a higher serum level.
Sucralfate Sucralfate Cetirizine may decrease the excretion rate of Sucralfate which could result in a higher serum level.
Floxuridine Floxuridine Floxuridine may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Phenobarbital Phenobarbital The risk or severity of adverse effects can be increased when Cetirizine is combined with Phenobarbital.
Metaxalone Metaxalone The risk or severity of adverse effects can be increased when Cetirizine is combined with Metaxalone.
Methotrexate Injection Methotrexate Injection Methotrexate may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Levorphanol Levorphanol The risk or severity of adverse effects can be increased when Cetirizine is combined with Levorphanol.
Primidone Primidone The risk or severity of adverse effects can be increased when Cetirizine is combined with Primidone.
Methsuximide Methsuximide The risk or severity of adverse effects can be increased when Cetirizine is combined with Methsuximide.
Diethylpropion Diethylpropion Diethylpropion may decrease the sedative and stimulatory activities of Cetirizine.
Chlorpromazine Chlorpromazine Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Chlorpromazine.
Diazepam Diazepam The risk or severity of adverse effects can be increased when Cetirizine is combined with Diazepam.
Oxazepam Oxazepam The risk or severity of adverse effects can be increased when Cetirizine is combined with Oxazepam.
Flurazepam Flurazepam The risk or severity of adverse effects can be increased when Cetirizine is combined with Flurazepam.
Clorazepate Clorazepate The risk or severity of adverse effects can be increased when Cetirizine is combined with Clorazepic acid.
Lorazepam Lorazepam The risk or severity of adverse effects can be increased when Lorazepam is combined with Cetirizine.
Carmustine Carmustine Carmustine may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Amantadine Amantadine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Amantadine.
Codeine Codeine The risk or severity of adverse effects can be increased when Codeine is combined with Cetirizine.
Meprobamate Meprobamate The risk or severity of adverse effects can be increased when Cetirizine is combined with Meprobamate.
Chlordiazepoxide Chlordiazepoxide The risk or severity of adverse effects can be increased when Cetirizine is combined with Chlordiazepoxide.
Bromocriptine Bromocriptine The risk or severity of adverse effects can be increased when Cetirizine is combined with Bromocriptine.
Tranylcypromine Tranylcypromine The risk or severity of adverse effects can be increased when Cetirizine is combined with Tranylcypromine.
Phenelzine Phenelzine The risk or severity of adverse effects can be increased when Cetirizine is combined with Phenelzine.
Procarbazine Procarbazine The risk or severity of adverse effects can be increased when Cetirizine is combined with Procarbazine.
Ergoloid Mesylates Ergoloid Mesylates The risk or severity of adverse effects can be increased when Cetirizine is combined with Ergoloid mesylate.
Tetracycline Tetracycline Cetirizine may decrease the excretion rate of Tetracycline which could result in a higher serum level.
Minocycline Minocycline Minocycline may increase the central nervous system depressant (CNS depressant) activities of Cetirizine.
Prochlorperazine Prochlorperazine The risk or severity of adverse effects can be increased when Cetirizine is combined with Prochlorperazine.
Thioridazine Thioridazine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Thioridazine.
Trifluoperazine Trifluoperazine The risk or severity of adverse effects can be increased when Cetirizine is combined with Trifluoperazine.
Bleomycin Bleomycin Bleomycin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Sulfadiazine Sulfadiazine Cetirizine may decrease the excretion rate of Sulfadiazine which could result in a higher serum level.
Oxycodone Oxycodone The risk or severity of adverse effects can be increased when Cetirizine is combined with Oxycodone.
Methadone Methadone The risk or severity of adverse effects can be increased when Methadone is combined with Cetirizine.
Oxybutynin Oxybutynin Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Oxybutynin.
Benztropine Benztropine Benzatropine may increase the central nervous system depressant (CNS depressant) activities of Cetirizine.
Maprotiline Maprotiline Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Maprotiline.
Ibuprofen Ibuprofen Ibuprofen may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Trihexyphenidyl Trihexyphenidyl Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Trihexyphenidyl.
Orphenadrine Orphenadrine Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Orphenadrine.
Perphenazine Perphenazine The risk or severity of adverse effects can be increased when Cetirizine is combined with Perphenazine.
Azathioprine Azathioprine Cetirizine may decrease the excretion rate of Azathioprine which could result in a higher serum level.
Fluphenazine Fluphenazine The risk or severity of adverse effects can be increased when Cetirizine is combined with Fluphenazine.
Phentermine Phentermine Phentermine may decrease the sedative and stimulatory activities of Cetirizine.
Methylphenidate Methylphenidate Cetirizine may decrease the excretion rate of Methylphenidate which could result in a higher serum level.
Amoxapine Amoxapine Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Amoxapine.
Sulfasalazine Sulfasalazine Sulfasalazine may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Phenazopyridine Phenazopyridine Phenazopyridine may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Carbamazepine Carbamazepine Cetirizine may decrease the excretion rate of Carbamazepine which could result in a higher serum level.
Molindone Molindone The risk or severity of adverse effects can be increased when Cetirizine is combined with Molindone.
Methyldopa Methyldopa Cetirizine may decrease the excretion rate of Methyldopa which could result in a higher serum level.
Clonidine Clonidine The risk or severity of sedation can be increased when Clonidine is combined with Cetirizine.
Hydralazine Hydralazine Cetirizine may decrease the excretion rate of Hydralazine which could result in a higher serum level.
Cimetidine Cimetidine Cetirizine may decrease the excretion rate of Cimetidine which could result in a higher serum level.
Gentamicin Injection Gentamicin Injection Gentamicin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Warfarin Warfarin Cetirizine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Clonazepam Clonazepam The risk or severity of adverse effects can be increased when Cetirizine is combined with Clonazepam.
Loperamide Loperamide The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Loperamide.
Promethazine Promethazine The risk or severity of adverse effects can be increased when Cetirizine is combined with Promethazine.
Meclofenamate Meclofenamate Meclofenamic acid may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Nitrofurantoin Nitrofurantoin Cetirizine may decrease the excretion rate of Nitrofurantoin which could result in a higher serum level.
Digoxin Digoxin Cetirizine may decrease the excretion rate of Digoxin which could result in a higher serum level.
Loxapine Loxapine The risk or severity of adverse effects can be increased when Cetirizine is combined with Loxapine.
Chloroquine Chloroquine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Chloroquine.
Quinine Quinine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Quinine.
Ethosuximide Ethosuximide The risk or severity of adverse effects can be increased when Cetirizine is combined with Ethosuximide.
Triamterene Triamterene Triamterene may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Chlorothiazide Chlorothiazide Chlorothiazide may increase the excretion rate of Cetirizine which could result in a lower serum level and potentially a reduction in efficacy.
Chlorthalidone Chlorthalidone Chlorthalidone may increase the excretion rate of Cetirizine which could result in a lower serum level and potentially a reduction in efficacy.
Metolazone Metolazone Cetirizine may increase the excretion rate of Metolazone which could result in a lower serum level and potentially a reduction in efficacy.
Isosorbide Isosorbide Isosorbide may increase the excretion rate of Cetirizine which could result in a lower serum level and potentially a reduction in efficacy.
Secobarbital Secobarbital The risk or severity of adverse effects can be increased when Cetirizine is combined with Secobarbital.
Desipramine Desipramine Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Desipramine.
Amitriptyline Amitriptyline Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Amitriptyline.
Imipramine Imipramine Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Imipramine.
Probenecid Probenecid Cetirizine may decrease the excretion rate of Probenecid which could result in a higher serum level.
Quinidine Quinidine Cetirizine may decrease the excretion rate of Quinidine which could result in a higher serum level.
Procainamide Procainamide Cetirizine may decrease the excretion rate of Procainamide which could result in a higher serum level.
Isoniazid Isoniazid Cetirizine may decrease the excretion rate of Isoniazid which could result in a higher serum level.
Pyrazinamide Pyrazinamide Pyrazinamide may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Disopyramide Disopyramide The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Disopyramide.
Valproic Acid Valproic Acid The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Valproic acid.
Tamoxifen Tamoxifen The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Tamoxifen.
Butabarbital Butabarbital The risk or severity of adverse effects can be increased when Butabarbital is combined with Cetirizine.
Liothyronine Liothyronine Liothyronine may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Methimazole Methimazole Cetirizine may decrease the excretion rate of Methimazole which could result in a higher serum level.
Chlorpropamide Chlorpropamide Cetirizine may decrease the excretion rate of Chlorpropamide which could result in a higher serum level.
Tolbutamide Tolbutamide Cetirizine may decrease the excretion rate of Tolbutamide which could result in a higher serum level.
Tolazamide Tolazamide Cetirizine may decrease the excretion rate of Tolazamide which could result in a higher serum level.
Dextromethorphan Dextromethorphan The risk or severity of adverse effects can be increased when Cetirizine is combined with Dextromethorphan.
Cyclobenzaprine Cyclobenzaprine The risk or severity of CNS depression can be increased when Cetirizine is combined with Cyclobenzaprine.
Baclofen Baclofen The risk or severity of adverse effects can be increased when Baclofen is combined with Cetirizine.
Doxylamine Doxylamine Doxylamine may increase the central nervous system depressant (CNS depressant) activities of Cetirizine.
Cyproheptadine Cyproheptadine Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Cyproheptadine.
Clemastine Clemastine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Clemastine.
Chlorpheniramine Chlorpheniramine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Chlorpheniramine.
Brompheniramine Brompheniramine The risk or severity of adverse effects can be increased when Cetirizine is combined with Dexbrompheniramine.
Meclizine Meclizine The risk or severity of adverse effects can be increased when Cetirizine is combined with Meclizine.
Ethambutol Ethambutol Ethambutol may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Methyclothiazide Methyclothiazide Methyclothiazide may increase the excretion rate of Cetirizine which could result in a lower serum level and potentially a reduction in efficacy.
Hydrochlorothiazide Hydrochlorothiazide Hydrochlorothiazide may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Dantrolene Dantrolene The risk or severity of adverse effects can be increased when Cetirizine is combined with Dantrolene.
Chlorzoxazone Chlorzoxazone The risk or severity of adverse effects can be increased when Cetirizine is combined with Chlorzoxazone.
Carisoprodol Carisoprodol The risk or severity of adverse effects can be increased when Carisoprodol is combined with Cetirizine.
Methocarbamol Methocarbamol The risk or severity of adverse effects can be increased when Cetirizine is combined with Methocarbamol.
Pyridoxine Pyridoxine Pyridoxine may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Folic Acid Folic Acid Folic acid may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Disulfiram Disulfiram The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Disulfiram.
Propranolol (Cardiovascular) Propranolol (Cardiovascular) The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Propranolol.
Nortriptyline Nortriptyline Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Nortriptyline.
Spironolactone Spironolactone Spironolactone may increase the excretion rate of Cetirizine which could result in a lower serum level and potentially a reduction in efficacy.
Amphotericin B Injection Amphotericin B Injection Amphotericin B may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Phytonadione Phytonadione Cetirizine may decrease the excretion rate of Phylloquinone which could result in a higher serum level.
Amikacin Injection Amikacin Injection Amikacin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Nadolol Nadolol Cetirizine may decrease the excretion rate of Nadolol which could result in a higher serum level.
Butorphanol Injection Butorphanol Injection The risk or severity of adverse effects can be increased when Cetirizine is combined with Butorphanol.
Nalbuphine Injection Nalbuphine Injection The risk or severity of adverse effects can be increased when Cetirizine is combined with Nalbuphine.
Allopurinol Allopurinol Cetirizine may decrease the excretion rate of Allopurinol which could result in a higher serum level.
Oxytocin Injection Oxytocin Injection The risk or severity of QTc prolongation can be increased when Oxytocin is combined with Cetirizine.
Trimethobenzamide Trimethobenzamide The risk or severity of adverse effects can be increased when Cetirizine is combined with Trimethobenzamide.
Flavoxate Flavoxate Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Flavoxate.
Papaverine Papaverine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Papaverine.
Fluorouracil Injection Fluorouracil Injection The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Fluorouracil.
Colchicine Colchicine Cetirizine may decrease the excretion rate of Colchicine which could result in a higher serum level.
Cefaclor Cefaclor Cefaclor may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Cefadroxil Cefadroxil Cefadroxil may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Cefazolin Injection Cefazolin Injection Cefazolin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Cephalexin Cephalexin Cephalexin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Cefoxitin Injection Cefoxitin Injection Cefoxitin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Dacarbazine Dacarbazine Cetirizine may decrease the excretion rate of Dacarbazine which could result in a higher serum level.
Acetazolamide Acetazolamide The risk or severity of adverse effects can be increased when Cetirizine is combined with Acetazolamide.
Cefotaxime Injection Cefotaxime Injection Cefotaxime may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Calcitonin Salmon Injection Calcitonin Salmon Injection Salmon calcitonin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Ketoconazole Ketoconazole The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Ketoconazole.
Pyrantel Pyrantel The risk or severity of adverse effects can be increased when Cetirizine is combined with Pyrantel.
Ethacrynic Acid Ethacrynic Acid Etacrynic acid may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Colistimethate Injection Colistimethate Injection Colistimethate may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Metoprolol Metoprolol Metoprolol may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Hydroxyzine Hydroxyzine The risk or severity of QTc prolongation can be increased when Hydroxyzine is combined with Cetirizine.
Thiothixene Thiothixene The risk or severity of adverse effects can be increased when Cetirizine is combined with Thiothixene.
Aspirin Aspirin Acetylsalicylic acid may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Salsalate Salsalate Salsalate may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Alprazolam Alprazolam The risk or severity of adverse effects can be increased when Cetirizine is combined with Alprazolam.
Temazepam Temazepam The risk or severity of adverse effects can be increased when Temazepam is combined with Cetirizine.
Triazolam Triazolam The risk or severity of adverse effects can be increased when Cetirizine is combined with Triazolam.
Dicyclomine Dicyclomine Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Dicyclomine.
Hyoscyamine Hyoscyamine Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Hyoscyamine.
Propantheline Propantheline Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Propantheline.
Trimethoprim Trimethoprim Cetirizine may decrease the excretion rate of Trimethoprim which could result in a higher serum level.
Diltiazem Diltiazem The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Diltiazem.
Nifedipine Nifedipine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Nifedipine.
Timolol Timolol The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Timolol.
Verapamil Verapamil Cetirizine may decrease the excretion rate of Verapamil which could result in a higher serum level.
Pindolol Pindolol The risk or severity of adverse effects can be increased when Cetirizine is combined with Pindolol.
Cisplatin Injection Cisplatin Injection Cetirizine may decrease the excretion rate of Cisplatin which could result in a higher serum level.
Diflunisal Diflunisal Diflunisal may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Piroxicam Piroxicam Piroxicam may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Bumetanide Bumetanide Cetirizine may increase the excretion rate of Bumetanide which could result in a lower serum level and potentially a reduction in efficacy.
Glipizide Glipizide Cetirizine may decrease the excretion rate of Glipizide which could result in a higher serum level.
Indapamide Indapamide Cetirizine may increase the excretion rate of Indapamide which could result in a lower serum level and potentially a reduction in efficacy.
Amoxicillin Amoxicillin Cetirizine may decrease the excretion rate of Amoxicillin which could result in a higher serum level.
Oxacillin Injection Oxacillin Injection Cetirizine may decrease the excretion rate of Oxacillin which could result in a higher serum level.
Pentoxifylline Pentoxifylline Cetirizine may decrease the excretion rate of Pentoxifylline which could result in a higher serum level.
Pentamidine Injection Pentamidine Injection The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Pentamidine.
Ceftriaxone Injection Ceftriaxone Injection Ceftriaxone may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Labetalol Labetalol Cetirizine may decrease the excretion rate of Labetalol which could result in a higher serum level.
Auranofin Auranofin Cetirizine may decrease the excretion rate of Auranofin which could result in a higher serum level.
Leuprolide Injection Leuprolide Injection The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Leuprolide.
Gemfibrozil Gemfibrozil Cetirizine may decrease the excretion rate of Gemfibrozil which could result in a higher serum level.
Dipivefrin Ophthalmic Dipivefrin Ophthalmic Adefovir dipivoxil may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Ceftazidime Injection Ceftazidime Injection Ceftazidime may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Ketoprofen Ketoprofen Ketoprofen may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Cefotetan Injection Cefotetan Injection Cefotetan may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Pimozide Pimozide The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Pimozide.
Flurbiprofen Flurbiprofen Flurbiprofen may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Amiodarone Amiodarone The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Amiodarone.
Aztreonam Injection Aztreonam Injection Cetirizine may decrease the excretion rate of Aztreonam which could result in a higher serum level.
Buspirone Buspirone Cetirizine may decrease the excretion rate of Buspirone which could result in a higher serum level.
Ciprofloxacin Ciprofloxacin The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Ciprofloxacin.
Mesalamine Mesalamine Mesalazine may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Diclofenac Diclofenac Diclofenac may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Fluoxetine Fluoxetine Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Fluoxetine.
Nimodipine Nimodipine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Nimodipine.
Clozapine Clozapine The risk or severity of adverse effects can be increased when Cetirizine is combined with Clozapine.
Estazolam Estazolam The risk or severity of adverse effects can be increased when Cetirizine is combined with Estazolam.
Ofloxacin Ofloxacin The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Ofloxacin.
Didanosine Didanosine Cetirizine may decrease the excretion rate of Didanosine which could result in a higher serum level.
Pentostatin Injection Pentostatin Injection Cetirizine may decrease the excretion rate of Pentostatin which could result in a higher serum level.
Clarithromycin Clarithromycin The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Clarithromycin.
Etodolac Etodolac Etodolac may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Felodipine Felodipine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Felodipine.
Fosinopril Fosinopril Cetirizine may decrease the excretion rate of Fosinopril which could result in a higher serum level.
Nabumetone Nabumetone Nabumetone may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Itraconazole Itraconazole The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Itraconazole.
Lisinopril Lisinopril Cetirizine may decrease the excretion rate of Lisinopril which could result in a higher serum level.
Oxaprozin Oxaprozin Oxaprozin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Sotalol Sotalol The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Sotalol.
Bisoprolol Bisoprolol Cetirizine may decrease the excretion rate of Bisoprolol which could result in a higher serum level.
Zolpidem Zolpidem Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Zolpidem.
Isradipine Isradipine The risk or severity of QTc prolongation can be increased when Isradipine is combined with Cetirizine.
Cisapride Cisapride The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Cisapride.
Gabapentin Gabapentin The risk or severity of adverse effects can be increased when Cetirizine is combined with Gabapentin.
Venlafaxine Venlafaxine The risk or severity of adverse effects can be increased when Venlafaxine is combined with Cetirizine.
Fluvoxamine Fluvoxamine The risk or severity of adverse effects can be increased when Cetirizine is combined with Fluvoxamine.
Nefazodone Nefazodone The risk or severity of adverse effects can be increased when Cetirizine is combined with Nefazodone.
Lamotrigine Lamotrigine The risk or severity of adverse effects can be increased when Cetirizine is combined with Lamotrigine.
Losartan Losartan The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Losartan.
Valacyclovir Valacyclovir Valaciclovir may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Tramadol Tramadol The risk or severity of CNS depression can be increased when Cetirizine is combined with Tramadol.
Carboplatin Injection Carboplatin Injection Carboplatin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Moexipril Moexipril The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Moexipril.
Ifosfamide Injection Ifosfamide Injection Cetirizine may decrease the excretion rate of Ifosfamide which could result in a higher serum level.
Nicardipine Nicardipine Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Nicardipine.
Bupropion Bupropion The risk or severity of adverse effects can be increased when Cetirizine is combined with Bupropion.
Ticlopidine Ticlopidine Ticlopidine may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Saquinavir Saquinavir The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Saquinavir.
Metformin Metformin Metformin may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Nisoldipine Nisoldipine Cetirizine may decrease the excretion rate of Nisoldipine which could result in a higher serum level.
Lamivudine Lamivudine Cetirizine may decrease the excretion rate of Lamivudine which could result in a higher serum level.
Riluzole Riluzole The risk or severity of adverse effects can be increased when Cetirizine is combined with Riluzole.
Acarbose Acarbose Acarbose may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Gemcitabine Injection Gemcitabine Injection Cetirizine may decrease the excretion rate of Gemcitabine which could result in a higher serum level.
Ritonavir Ritonavir The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Ritonavir.
Cidofovir Injection Cidofovir Injection Cidofovir may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Meropenem Injection Meropenem Injection Cetirizine may decrease the excretion rate of Meropenem which could result in a higher serum level.
Clomipramine Clomipramine The risk or severity of adverse effects can be increased when Cetirizine is combined with Clomipramine.
Fosfomycin Fosfomycin Cetirizine may decrease the excretion rate of Fosfomycin which could result in a higher serum level.
Mirtazapine Mirtazapine Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Mirtazapine.
Topiramate Topiramate The risk or severity of adverse effects can be increased when Topiramate is combined with Cetirizine.
Pramipexole Pramipexole Cetirizine may increase the sedative activities of Pramipexole.
Donepezil Donepezil The risk or severity of adverse effects can be increased when Cetirizine is combined with Donepezil.
Nelfinavir Nelfinavir The risk or severity of QTc prolongation can be increased when Nelfinavir is combined with Cetirizine.
Azithromycin Azithromycin The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Azithromycin.
Nilutamide Nilutamide Cetirizine may decrease the excretion rate of Nilutamide which could result in a higher serum level.
Flutamide Flutamide Cetirizine may decrease the excretion rate of Flutamide which could result in a higher serum level.
Selegiline Selegiline The risk or severity of adverse effects can be increased when Cetirizine is combined with Selegiline.
Sertraline Sertraline The risk or severity of adverse effects can be increased when Cetirizine is combined with Sertraline.
Propafenone Propafenone The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Propafenone.
Tamsulosin Tamsulosin Cetirizine may decrease the excretion rate of Tamsulosin which could result in a higher serum level.
Ropinirole Ropinirole Cetirizine may increase the sedative activities of Ropinirole.
Quetiapine Quetiapine Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Quetiapine.
Cefepime Injection Cefepime Injection Cefepime may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Cefprozil Cefprozil Cefprozil may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Cefpodoxime Cefpodoxime Cefpodoxime may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Paroxetine Paroxetine The risk or severity of adverse effects can be increased when Cetirizine is combined with Paroxetine.
Tolcapone Tolcapone The risk or severity of adverse effects can be increased when Tolcapone is combined with Cetirizine.
Citalopram Citalopram The risk or severity of adverse effects can be increased when Cetirizine is combined with Citalopram.
Capecitabine Capecitabine Cetirizine may decrease the excretion rate of Capecitabine which could result in a higher serum level.
Efavirenz Efavirenz The risk or severity of adverse effects can be increased when Cetirizine is combined with Efavirenz.
Abacavir Abacavir Cetirizine may decrease the excretion rate of Abacavir which could result in a higher serum level.
Celecoxib Celecoxib Celecoxib may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Rosiglitazone Rosiglitazone Cetirizine may decrease the excretion rate of Rosiglitazone which could result in a higher serum level.
Tolterodine Tolterodine Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Tolterodine.
Thalidomide Thalidomide Cetirizine may increase the central nervous system depressant (CNS depressant) activities of Thalidomide.
Oseltamivir Oseltamivir Oseltamivir may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Balsalazide Balsalazide Balsalazide may decrease the excretion rate of Cetirizine which could result in a higher serum level.
Nateglinide Nateglinide Cetirizine may decrease the excretion rate of Nateglinide which could result in a higher serum level.
Galantamine Galantamine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Galantamine.
Levetiracetam Levetiracetam The risk or severity of adverse effects can be increased when Cetirizine is combined with Levetiracetam.
Rabeprazole Rabeprazole Cetirizine may decrease the excretion rate of Rabeprazole which could result in a higher serum level.

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