Mixing DOx and Tylenol PM
Caution
Carries risk that is worth understanding before combining. Reduce doses and do not use alone.
Can you take DOx with Tylenol PM?
Tylenol PM contains acetaminophen and diphenhydramine. The most concerning part is DOx with Tylenol PM (Diphenhydramine): beyond an ordinary 25–50 mg dose of diphenhydramine, DOx makes its delirium worse and adds heart strain. Keep diphenhydramine to that dose. MixSafe rates DOx 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, the TripSit combination chart and MixSafe research. Educational information, not medical advice.
What is in it
- Tylenol PM
- Acetaminophen + Diphenhydramine.
Ingredient by ingredient
DOx + Tylenol PM (Diphenhydramine)Caution
Beyond an ordinary 25–50 mg dose of diphenhydramine, DOx makes its delirium worse and adds heart strain. Keep diphenhydramine to that dose.
At 25-50mg, DPH may assist with side effects of DOx drugs such as nausea and anxiety. At higher dosages, the combination of a deliriant (DPH) and DOx drugs is cautioned against. DOx drugs are likely to increase the deliriant and negative effects of DPH, in addition to increasing the risk of severe injury and mental trauma. DOx drugs and DPH at recreational dosages have additional cardiac concerns such as vasoconstriction, tachycardia, hypertension, which in combination may be exacerbated.
Source: TripSit drug combination chart
DOx + 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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