Unisom
Unisom is the Pfizer brand name for an over-the-counter sleep-aid medication. While marketed under a single trademark, the active ingredient may be one of two drugs, depending on the type of preparation. Doxylamine succinate is sold in 25mg dosages as tablets, and diphenhydramine hydrochloride is sold in a liquid/gelatin preparation in dosages of 50mg.
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