Generic Unisom

Unisom (diphenhydramine or doxylamine) is an antihistamine used as an over-the-counter sleep aid. Antihistamines often cause drowsiness and sedation and can be used to help with difficult falling asleep. Unisom capsules and chewable tablets have diphenhydramine as an active ingredient, and the tablets have doxylamine; both are available as generic antihistamine sleep aids.

Get Diphenhydramine for as low as $0.69, which is 91% off the average retail price of $7.88 for the most common version, by using a GoodRx coupon.