SPL Set ID: 6533e629-a27b-4489-8fa3-7de32fbf809e

Diphenhydramine Hydrochloride Injection is a sterile, nonpyrogenic solution for intravenous or deep intramuscular use as an antihistaminic agent. Each mL contains diphenhydramine hydrochloride USP 50 mg in Water for Injection. pH 4.0 to 6.5; sodium hydroxide and/or hydrochloric acid added, if needed, for pH adjustment. The chemical name of diphenhydramine hydrochloride is 2-(Diphenylmethoxy)-N,N-dimethylethylamine hydrochloride. The structural formula is as follows: C 17 H 21 NO • HCI MW 291.82 Diphenhydramine hydrochloride occurs as a white crystalline powder and is freely soluble in water and alcohol. structural formula