Misc: Diphenhydramine HCl tablets, 25 mg. Non-habit forming. No. 1 pharmacist recommended ingredient (Pharmacy Times - 2014 OTC survey). Quickly melts in your mouth. Fall asleep fast. Sleep soundly. Wake refreshed. This product contains diphenhydramine HCl. Unisom SleepTabs tablets contain doxylamine succinate. www.Unisom.com.