Sominex
Sominex is the antihistamine Diphenhydramine in the United States, and is sold over the counter (OTC). Promethazine hydrochloride is the antihistamine ingredient in the UK version of Sominex, and is also sold OTC.
Sominex is the antihistamine Diphenhydramine in the United States, and is sold over the counter (OTC). Promethazine hydrochloride is the antihistamine ingredient in the UK version of Sominex, and is also sold OTC.