Cannabidiol (cbd) + acetaminophen, dextromethorphan, doxylamine
acetaminophen, dextromethorphan, doxylamine brand name: NyQuil.
Cannabidiol (cbd) has a moderate interaction with acetaminophen, dextromethorphan, doxylamine. Theoretically, cannabidiol might have additive effects if used with other CNS depressants.
Read the full interaction reportCannabidiol (cbd) and acetaminophen, dextromethorphan, doxylamine
Here is the interaction we found between these two, with the evidence behind it.
CNS DEPRESSANTS
Why this applies to acetaminophen, dextromethorphan, doxylamine
acetaminophen, dextromethorphan, doxylamine falls under CNS DEPRESSANTS — the group Cannabidiol (cbd) interacts with.
Preliminary clinical research, case reports, and animal studies suggest that high dose cannabidiol has sedative and hypnotic effects. Theoretically, concomitant use of cannabidiol with drugs with sedative and anesthetic properties may cause additive therapeutic and adverse effects.
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.
NyQuil already has a built-in sleepy ingredient called doxylamine (an antihistamine), and the dextromethorphan in it can add to that drowsy feeling too. When you put CBD on top, the main concern is simple: both can make you more sedated than either one alone. You might feel extra groggy, foggy, dizzy, or wiped out the next morning.
To be honest, this is a theoretical caution based mostly on how higher CBD doses can act sedating. It is not a dangerous chemical clash, just a 'they may stack up' situation. Be careful driving or doing anything that needs focus until you know how the combo hits you, and check with your pharmacist or doctor before mixing them, especially with stronger CBD products.
- Carlini EA, Cunha JM. Hypnotic and antiepileptic effects of cannabidiol. J Clin Pharmacol 1981;21(8-9 Suppl):417S-27S. PubMed
- Monti JM. Hypnoticlike effects of cannabidiol in the rat. Psychopharmacology (Berl) 1977;55(3):263-5. PubMed
- Pickens JT. Sedative activity of cannabis in relation to its delta'-trans-tetrahydrocannabinol and cannabidiol content. Br J Pharmacol 1981;72(4):649-56.
- Perez-Vilar S, Karami S, Long K, Leishear K. Cannabidiol exposures in the United States, National Poison Data System, July 2014-June 2021. Clin Toxicol (Phila) 2022. PubMed
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.
Cannabidiol (cbd) Also Interacts With Other Medications
Cannabidiol (cbd) has 1,050 moderate known drug interactions in our database — the acetaminophen, dextromethorphan, doxylamine one above is one of them. If you take anything else, check it against the full list below.
Check Another of Your Medications Against Cannabidiol (cbd)
We haven’t checked that one against Cannabidiol (cbd) yet — ask our pharmacists directly.
Covers the 2,830 medications we’ve checked against Cannabidiol (cbd). Pick one to open its full report.
See Every Supplement That Interacts With acetaminophen, dextromethorphan, doxylamine
This page covers Cannabidiol (cbd) only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the acetaminophen, dextromethorphan, doxylamine page lists 106 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: 1,4-butanediol (major), Activated Charcoal (major), Beer (major), Gamma-hydroxybutyrate (ghb) (major) and Grapefruit (major).
By severity: 8 major · 78 moderate · 20 minor.
From our pharmacist’s overview on the acetaminophen, dextromethorphan, doxylamine page
“NyQuil (acetaminophen, dextromethorphan, doxylamine) is designed to make you drowsy, and that is exactly where most of its supplement interactions live. Seventy-eight of the 106 ingredients on this list add to its sedation, and the eight rated major, alcohol and kava among them, can push a nighttime cold remedy toward serious depressio…”
Reviewed by 2 · Jul 18, 2026
Open the acetaminophen, dextromethorphan, doxylamine interaction page
Where Cannabidiol (cbd) and acetaminophen, dextromethorphan, doxylamine 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.
#464 of 1,452 supplements looked up here in the last 7 days
#185 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 Cannabidiol (cbd)
What is Cannabidiol (cbd)?
- Anxiety and stress
- Sleep problems
- Chronic pain
- Certain seizure disorders
- Inflammation
CBD is a compound from the cannabis (hemp) plant that does not cause a 'high.' It has strong evidence only for certain rare seizure disorders (as a prescription drug), while most other popular uses are still backed by limited or early research. Product quality varies a lot, so talk with your pharmacist or doctor before using it, especially if you take other medicines.
Other Drugs & Cannabidiol (cbd)
Browse every other medication we’ve checked against Cannabidiol (cbd) — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
1,050 interactions
- Diclofenac Sodium ›
- Diltiazem ›
- Theophylline ›
- Nifedipine ›
- Ibuprofen ›
- Metronidazole ›
- Diphenhydramine ›
- Hydrocortisone ›
- Naproxen ›
- Erythromycin ›
- Estradiol ›
- Propranolol ›
- Lidocaine ›
- Norethindrone ›
- Testosterone ›
- Verapamil ›
- Levonorgestrel ›
- Prednisone ›
- Quinidine ›
- Cyclosporine ›
- Dexamethasone ›
- Flurazepam ›
- Glyburide ›
- Triazolam ›
- Zopiclone ›
- Bupropion ›
- Ciprofloxacin ›
- Colchicine ›
- Fentanyl ›
- Flurbiprofen ›
- Isotretinoin ›
- Orphenadrine ›
- Oxybutynin ›
- Oxycodone ›
- Phenytoin ›
- Prednisolone ›
- Tacrolimus ›
- Temazepam ›
- Apomorphine ›
- Budesonide ›
- Carbamazepine ›
- Clindamycin ›
- Dextromethorphan ›
- Diclofenac Potassium ›
- Doxorubicin ›
- Fluticasone ›
- Formoterol ›
- Indomethacin ›
- Miconazole ›
- Morphine Sulfate ›
- Nitrazepam ›
- Trimipramine ›
- Acetaminophen ›
- Amphetamine ›
- Buprenorphine ›
- Conjugated Estrogens ›
- Diazepam ›
- Everolimus ›
- Griseofulvin ›
- Ivabradine ›
Showing 60 of 1,050 moderate interactions — see all 1,050 on the Cannabidiol (cbd) page.
No interaction 1,779 drugs checked — show the list
We also checked Cannabidiol (cbd) against these medications and found no known interaction in our sources. Open any page to confirm.
- Levothyroxine ›
- Methylphenidate ›
- Ivermectin ›
- Aspirin ›
- Rosuvastatin ›
- Docusate ›
- Tirzepatide ›
- Valacyclovir ›
- Hydroxyurea ›
- Semaglutide ›
- Sumatriptan ›
- Metformin ›
- Amoxicillin ›
- Lisinopril ›
- Methotrexate ›
- Acyclovir ›
- Doxycycline ›
- Azithromycin ›
- Methylene Blue ›
- Levothyroxine, Liothyronine ›
- Candesartan Cilexetil ›
- Cyclopentolate ›
- Cephalexin ›
- Mannitol ›
- Amoxicillin, Clavulanate Potassium ›
- Ezetimibe ›
- Pegunigalsidase Alfa-iwxj ›
- Levothyroxine Sodium ›
- Dexmethylphenidate ›
- Spironolactone ›
- Daptomycin ›
- Thyroid Hormone ›
- Carbidopa, Levodopa ›
- Mitomycin ›
- Hexobarbitone ›
- Acetylsalicylic Acid ›
- Levodopa ›
- Hethylphenidate Hcl ›
- Factor 7a ›
- Minoxidil ›
- Bentoquatam ›
- Cefaclor ›
- Lenvatinib ›
- Azelaic Acid ›
- Pizotifen ›
- Phenylephrine ›
- Hydroxychloroquine ›
- Ribavirin Aerosol ›
- Alglucosidase Alpha ›
- Salbutamol Sulfate ›
- Insulin Degludec, Liraglutide ›
- Flutemetamol F-18 ›
- Vancomycin ›
- Tenecteplase ›
- Hydrochlorothiazide, Lisinopril ›
- Triptorelin ›
- Insulin Human, Sodium Chloride ›
- Dirithromycin ›
- Canagliflozin, Metformin ›
- Rocuronium ›
Showing the 60 most looked-up of 1,779 medications checked with no known interaction — see the full Cannabidiol (cbd) 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
Taking Cannabidiol (cbd) and acetaminophen, dextromethorphan, doxylamine Together: Common Questions
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