Unisom is a brand that sells multiple products to promote better sleep. Its most well-known product is the Unisom Sleep Tab, a pill that contains 25 milligrams of doxylamine succinate as the main ...

Benadryl (diphenhydramine) and Unisom (doxylamine succinate) are sleep aids that can be purchased over the counter. Both medications are antihistamines that have sedative side effects. Generic ...