Health & Medicine May 4, 2026 · 4 min
Anticholinergics and Antihistamines: Promethazine, Diphenhydramine, and Trihexyphenidyl
A clinical reference on OTC and prescription drugs abused for their deliriant, sedative, and hallucinogenic effects via anticholinergic mechanisms.
#promethazine#diphenhydramine#trihexyphenidyl