Unisom SleepMelts: Understanding Diphenhydramine HCl & its Effects

Diphenhydramine HCl

Diphenhydramine hydrochloride, an antihistamine that crosses the blood–brain barrier, produces the anticholinergic and sedative effects of Unisom SleepMelts. The chemical formula for diphenhydramine hydrochloride is C₁₇H₂₁NO•HCl, and its molecular weight is 291.816 g/mol.

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