It looks like you can obtain diphenhydramine hydrochloride in Allerdryl, Benadryl, Benylin Cough, Bydramine, Compoz, Diphen Cough, Nytol, Sleep-Eze 3, and Sominex 2.

Do not combine with amobarbital, amphotericin B, cephalothin, hydrocortisone, phenobarbital, phenytoin, or thiopental.