Diphenhydramine (Diphenhydramine Hydrochloride) - Description

DESCRIPTION

Diphenhydramine hydrochloride is an antihistamine drug having the chemical name 2-(Diphenylmethoxy)-N,N-dimethylethylamine hydrochloride. It occurs as a white, crystalline powder, is freely soluble in water and alcohol and has the molecular weight of 291.82. The molecular formula is C₁₇H₂₁NO•HCl. The structural formula is as follows:

Diphenhydramine hydrochloride injection is a sterile, pyrogen-free solution intended for I.M. or I.V. administration. Each mL contains 50 mg Diphenhydramine Hydrochloride, USP and sufficient hydrochloric acid and/or sodium hydroxide solution for pH adjustment (5.0–6.0). This product contains no antimicrobial preservative and is intended as a single use vial; once the unit is assembled and used, any remaining portion of the solution must be discarded with the entire unit.