Schizonepeta + Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine
Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine brand name: Multi Symptom Cold Relief.
Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine falls into 4 drug categories that Schizonepeta can interact with; the most serious is rated moderate. Animal research suggests that schizonepetin, a monoterpene constituent of schizonepeta, inhibits cytochrome P450 (CYP) 2D6.
Read the full interaction reportSchizonepeta and Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine
These two interact in 4 distinct ways. Each one is explained separately below.
Why Are There 4 Interactions?
Schizonepeta interacts with whole categories of medication. Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine falls into 4 of those categories, so it can interact with Schizonepeta in 4 different ways. We’ve listed each one below — your overall risk is driven by the most serious of them (Moderate).
CYTOCHROME P450 2D6 (CYP2D6) SUBSTRATES
1 of 4Why this applies to Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine
Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine falls under CYTOCHROME P450 2D6 (CYP2D6) SUBSTRATES — the group Schizonepeta interacts with.
Some substrates of CYP2D6 include amitriptyline (Elavil), codeine, desipramine (Norpramin), flecainide (Tambocor), haloperidol (Haldol), imipramine (Tofranil), metoprolol (Lopressor, Toprol XL), ondansetron (Zofran), paroxetine (Paxil), risperidone (Risperdal), tramadol (Ultram), venlafaxine (Effexor), and others.
Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
This combo cold product has one ingredient that matters most here: dextromethorphan, the cough suppressant. Your body relies on an enzyme called CYP2D6 to break it down. Lab and animal studies hint that a compound in Schizonepeta may slow that enzyme. If it does, dextromethorphan could build up a bit, which might mean more drowsiness, dizziness, or feeling foggy. In rare cases, very high dextromethorphan levels can cause restlessness or confusion.
That said, this is theoretical and based only on lab and animal data, so I would not lose sleep over it. The other ingredients (acetaminophen, chlorpheniramine, phenylpropanolamine) are less affected. If you take Schizonepeta regularly, just check in with your pharmacist before combining them.
- Bao B, Geng T, Cao Y, et al. Effects of schizonepetin on activity of mRNA expression of cytochrome P450 enzymes in rats. Int J Mol Sci. 2012;13(12):17006-18.
CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES
2 of 4Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine also falls under CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES.
Some substrates of CYP1A2 include clozapine (Clozaril), cyclobenzaprine (Flexeril), fluvoxamine (Luvox), haloperidol (Haldol), imipramine (Tofranil), mexiletine (Mexitil), olanzapine (Zyprexa), pentazocine (Talwin), propranolol (Inderal), tacrine (Cognex), theophylline, zileuton (Zyflo), zolmitriptan (Zomig), and others.
Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
This combination cold product packs four ingredients into one dose, so let's keep this in perspective. The concern on file is that Schizonepeta may slow down a liver enzyme called CYP1A2. In theory, that could let certain medicines linger a bit longer than usual. Of the ingredients here, none lean heavily on CYP1A2 for clearance, so the practical impact is likely small.
Still, if levels did creep up, you might notice more of the usual effects from this product, like drowsiness or dry mouth from the chlorpheniramine, or feeling jittery from the decongestant. Importantly, this warning comes only from lab and animal research, not human studies, so it's theoretical. Casual culinary or tea amounts are unlikely to matter much, but concentrated supplements are less certain. Check with your pharmacist before pairing them.
- Bao B, Geng T, Cao Y, et al. Effects of schizonepetin on activity of mRNA expression of cytochrome P450 enzymes in rats. Int J Mol Sci. 2012;13(12):17006-18.
CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES
3 of 4Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine also falls under CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES.
Some substrates of CYP3A4 include lovastatin (Mevacor), ketoconazole (Nizoral), itraconazole (Sporanox), fexofenadine (Allegra), triazolam (Halcion), and numerous others.
Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
Here's the gist with this multi-symptom cold product. Schizonepeta has shown, in animal and test-tube studies only, that it may speed up an enzyme in your liver called CYP3A4. That same enzyme helps break down the dextromethorphan (the cough suppressant) in your cold medicine. If the herb revs up that enzyme, your body could clear the cough portion a little faster, which might make it work less well for calming a cough.
I want to be straight with you though: this is very weak, theoretical evidence, and we don't have human studies showing it actually matters. The acetaminophen, chlorpheniramine, and phenylpropanolamine pieces aren't really driven by this pathway. I wouldn't lose sleep over it, but check with your pharmacist before combining them.
- Bao B, Geng T, Cao Y, et al. Effects of schizonepetin on activity of mRNA expression of cytochrome P450 enzymes in rats. Int J Mol Sci. 2012;13(12):17006-18.
CYTOCHROME P450 2E1 (CYP2E1) SUBSTRATES
4 of 4Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine also falls under CYTOCHROME P450 2E1 (CYP2E1) SUBSTRATES.
Some substrates of CYP2E1 include acetaminophen, chlorzoxazone (Parafon Forte), ethanol, theophylline, and anesthetics such as enflurane (Ethrane), halothane (Fluothane), isoflurane (Forane), and methoxyflurane (Penthrane).
Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
The piece of this combo cold product that matters here is the acetaminophen (the pain and fever reducer, also known as Tylenol). One enzyme called CYP2E1 helps process acetaminophen, and lab and animal studies hint that a compound in Schizonepeta may slow that enzyme down. In theory, that could let a bit more acetaminophen linger in the body. Since acetaminophen is hard on the liver in high amounts, the concern is mostly about not overdoing the total dose.
The honest truth is that this is very weak evidence, based only on test-tube and animal work, so I would not lose sleep over an occasional cold remedy. Still, it is smart to avoid extra acetaminophen from other products and skip alcohol. Check with your pharmacist if you plan to use Schizonepeta regularly.
- Bao B, Geng T, Cao Y, et al. Effects of schizonepetin on activity of mRNA expression of cytochrome P450 enzymes in rats. Int J Mol Sci. 2012;13(12):17006-18.
What These Ratings Mean
Every interaction above is graded three ways — here’s the key to each label.
Clinically significant. Avoid the combination, or use only under close professional supervision.
Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.
Generally not serious. Be aware of it and mention it to your pharmacist.
- LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
- ProbableInteraction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
- PossibleInteraction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
- UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
- AHigh-quality meta-analysis (quantitative systematic review).
- BCase-control study.
- CConsensus.
- DAnecdotal evidence.
These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.
Schizonepeta Also Interacts With Other Medications
Schizonepeta has 796 moderate known drug interactions in our database — the Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine one above is among them. If you take anything else, check it against the full list below.
Check Another of Your Medications Against Schizonepeta
We haven’t checked that one against Schizonepeta yet — ask our pharmacists directly.
Covers the 2,830 medications we’ve checked against Schizonepeta. Pick one to open its full report.
See Every Supplement That Interacts With Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine
This page covers Schizonepeta only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine page lists 300 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), Asarabacca (major), Beer (major), Ephedra (major) and Grapefruit (major).
By severity: 14 major · 241 moderate · 45 minor.
Open the Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interaction page
Taking Schizonepeta as Part of a Dietary Supplement Product? Check It for Interactions
We hold 285 real supplement products containing Schizonepeta, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Schizonepeta. Your product may carry other ingredients that interact with Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine too, on top of Schizonepeta — and those would not show on this page. Find your product and we’ll check every ingredient on its label:
Where Schizonepeta and Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine Sit Against Everything Else
Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.
#386 of 1,452 supplements looked up here in the last 7 days
#42 of 2,830 medications looked up here in the last 7 days
Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.
About Schizonepeta
What is Schizonepeta?
- Common cold and early-stage fever
- Itchy skin rashes and hives
- Sore throat
- Headache
- Measles and other skin eruptions (traditional use)
Schizonepeta is a mint-family herb long used in traditional Chinese medicine, usually as part of combination formulas for colds, fevers, and itchy skin conditions. Modern human evidence is very limited, so its benefits are not well proven. Talk to a pharmacist or doctor before using it, especially if you are pregnant, breastfeeding, or taking other medicines.
Other Drugs & Schizonepeta
Browse every other medication we’ve checked against Schizonepeta — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
796 interactions
- Diltiazem ›
- Theophylline ›
- Nifedipine ›
- Hydrocortisone ›
- Naproxen ›
- Erythromycin ›
- Estradiol ›
- Propranolol ›
- Lidocaine ›
- Norethindrone ›
- Testosterone ›
- Verapamil ›
- Levonorgestrel ›
- Prednisone ›
- Quinidine ›
- Cyclosporine ›
- Dexamethasone ›
- Triazolam ›
- Zopiclone ›
- Colchicine ›
- Fentanyl ›
- Oxybutynin ›
- Oxycodone ›
- Prednisolone ›
- Tacrolimus ›
- Temazepam ›
- Budesonide ›
- Carbamazepine ›
- Clindamycin ›
- Dextromethorphan ›
- Doxorubicin ›
- Fluticasone ›
- Formoterol ›
- Miconazole ›
- Morphine Sulfate ›
- Acetaminophen ›
- Amphetamine ›
- Buprenorphine ›
- Conjugated Estrogens ›
- Diazepam ›
- Everolimus ›
- Ivabradine ›
- Lofepramine ›
- Medroxyprogesterone ›
- Medroxyprogesterone Acetate ›
- Nortriptyline ›
- Propoxyphene ›
- Rifampin ›
- Testosterone Undecanoate ›
- Aripiprazole ›
- Bendamustine ›
- Caffeine (otc Drug) ›
- Ciclesonide ›
- Clonazepam ›
- Cyclobenzaprine ›
- Dapsone ›
- Desipramine ›
- Doxepin ›
- Duloxetine ›
- Erythromycin Ethylsuccinate ›
Showing 60 of 796 moderate interactions — see all 796 on the Schizonepeta page.
No interaction 2,033 drugs checked — show the list
We also checked Schizonepeta against these medications and found no known interaction in our sources. Open any page to confirm.
- Levothyroxine ›
- Methylphenidate ›
- Ivermectin ›
- Rosuvastatin ›
- Aspirin ›
- Escitalopram ›
- Isotretinoin ›
- Tirzepatide ›
- Ibuprofen ›
- Docusate ›
- Valacyclovir ›
- Metformin ›
- Hydroxyurea ›
- Levothyroxine, Liothyronine ›
- Sumatriptan ›
- Semaglutide ›
- Methotrexate ›
- Lisinopril ›
- Amoxicillin ›
- Bupropion ›
- Azithromycin ›
- Doxycycline ›
- Pregabalin ›
- Gabapentin ›
- Lamotrigine ›
- Acyclovir ›
- Methylene Blue ›
- Ciprofloxacin ›
- Candesartan Cilexetil ›
- Amoxicillin, Clavulanate Potassium ›
- Acetylsalicylic Acid ›
- Aluminum Hydroxide, Aspirin, Magnesium Hydroxide ›
- Insulin Degludec, Liraglutide ›
- Calcium Oxybate, Magnesium Oxybate, Potassium Oxybate, Sodium Oxybate ›
- Ezetimibe ›
- Cephalexin ›
- Atenolol, Chlorthalidone ›
- Avatrombopag Maleate ›
- Cyclopentolate ›
- Bendroflumethiazide, Rauwolfia Serpentina ›
- Levetiracetam ›
- Sacubitril, Valsartan ›
- Levodopa ›
- Enalapril Maleate ›
- Canagliflozin, Metformin ›
- Aspirin, Butalbital ›
- Thyroid Hormone ›
- Aminophylline, Amobarbital, Ephedrine ›
- Isoniazid, Pyrazinamide, Rifampin ›
- Ephedrine, Phenobarbital, Theophylline ›
- Carbidopa, Levodopa ›
- Sulfamethoxazole, Trimethoprim ›
- Mannitol ›
- Daunorubicin, Cytarabine ›
- Rosiglitazone Maleate ›
- Valsartan ›
- Bupivacaine, Meloxicam ›
- Alginic Acid, Aluminum Hydroxide ›
- Bismuth Subcarbonate, Calcium Carbonate, Opium ›
- Ceftolozane Sulfate, Tazobactam Sodium ›
Showing the 60 most looked-up of 2,033 medications checked with no known interaction — see the full Schizonepeta list.
Sources & How We Checked
Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference for vitamins, herbs and supplements — the basis for our interaction data.
- MedlinePlus, U.S. National Library of Medicine — NIH consumer drug information, used for the medication overviews.
- NIH Dietary Supplement Label Database (DSLD) — Official supplement product labels.
Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.
Parts of this content are provided by the Therapeutic Research Center, LLC.
DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
© 2021 Therapeutic Research Center, LLC
Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine Is Linked to Lower Levels of One Nutrient
Natural Medicines records Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine as a medicine that can lower these. This is not an interaction with Schizonepeta — it is a separate effect of the medicine, and it is a reason some people are advised to supplement rather than to avoid one:
Depletion records come from the licensed Natural Medicines database. Do not start a supplement on the strength of this page — ask your pharmacist or doctor whether it applies to you.
Taking Schizonepeta and Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine Together: Common Questions
Can you take Schizonepeta with Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine?
Why are there 4 interactions listed for Schizonepeta and Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine?
How serious is the Schizonepeta and Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interaction?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.