Each blue, coated caplet, imprinted with "Nytol" on one side, contains diphenhydramine HCl 50 mg. Non-medicinal ingredients: cornstarch, FD&C Blue No. 1 Aluminum Lake, lactose, microcrystalline cellulose, Opadry light blue YS-1-4004, silicon dioxide, and stearic acid.
The active sleep aid ingredient in Nytol® Extra Strength is diphenhydramine and is intended for the relief of occasional sleeplessness when difficulty falling asleep is due to fatigue, over-work or tiredness.
Diphenhydramine belongs to a group of medications known as antihistamines, the same active ingredient found in
many cold and allergy medications. The effect of Nytol® lasts for up to 6 hours.