Mixing Cannabis (weed) and Tylenol PM
Caution
Carries risk that is worth understanding before combining. Reduce doses and do not use alone.
Can you take Cannabis with Tylenol PM?
Tylenol PM contains acetaminophen and diphenhydramine. The most concerning part is Cannabis with Tylenol PM (Diphenhydramine): together they usually cause more confusion and anxiety than either alone. Take less of each than usual. MixSafe rates Cannabis with Tylenol PM as "Caution" — carries risk that is worth understanding before combining. Reduce doses and do not use alone. Sources: the Drug Facts labels on DailyMed and MixSafe research. Educational information, not medical advice.
What is in it
- Tylenol PM
- Acetaminophen + Diphenhydramine.
Ingredient by ingredient
Cannabis + Tylenol PM (Diphenhydramine)Caution
Together they usually cause more confusion and anxiety than either alone. Take less of each than usual.
Both can produce confusion and, at higher doses, hallucination. Together they commonly produce more disorientation and anxiety than either alone.
Sources: Serotonin Syndrome: Mechanisms, Diagnosis, High-Risk Interactions · Diphenhydramine interaction profile. Drugs.com
Cannabis + Tylenol PM (Acetaminophen)Low risk, no synergy
Neither substance is expected to meaningfully change the other. Both still carry their own individual risks.
No specific interaction is documented. Acetaminophen's main risk is dose-dependent liver injury, so the thing to watch in any combination is total daily intake across all products (roughly 4g/24h) and anything else straining the liver.
Sources: Prescott LF. Paracetamol, alcohol and the liver. Br J Clin Pharmacol. 2000 · Acetaminophen: A Liver Killer or Thriller
- Tylenol PM Extra Strength, Drug Facts label. DailyMed. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=ce58105b-f010-47af-8f31-6dd4ce4e9cba
Ingredient lists checked 2026-09-27. Formulas change and store brands differ, so the Drug Facts box on your own packet is the final word.
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