Jan 20, 2020 · ZzzQuil is an antihistamine that reduces the effects of natural chemical histamine in the body. ZzzQuil is used as a sleep-aid for the relief of occasional sleeplessness, and to reduce the …

Occasionally, I take a sleep aid to help with the funky hours that I need to log sleep (hello night shift). ZzzQuil helps me get to sleep pretty quickly and I wake up feeling well rested, without any grogginess.

Aug 24, 2025 · Key Takeaways ZzzQuil is an over-the-counter sleep aid that contains diphenhydramine as the active ingredient. It is used to treat insomnia, but studies show it is not a very effective sleep …

Jun 23, 2025 · Many over-the-counter sleep aids, including ZzzQuil, use diphenhydramine for its sedative properties. Although it might help people sleep, it can sometimes cause side effects like dry …

Oct 13, 2025 · What Is ZzzQuil and What Does It Do? ZzzQuil is an over-the-counter sleep aid created by Vicks, the same brand known for NyQuil. But unlike NyQuil, which treats cold and flu symptoms, …

Oct 1, 2025 · Active ingredient (in each 30 mL dose cup) Diphenhydramine HCl 50 mg Purpose Nighttime sleep-aid Uses for the relief of occasional sleeplessness - reduces time to fall asleep if you …

May 17, 2019 · The manufacturer recommends using ZzzQuil for relieving occasional sleeplessness. ZzzQuil works by helping to reduce the time it takes for a person to fall asleep.

Oct 3, 2025 · OTC brand names beginning with the letter ‘Z’ (ZzzQuil Nighttime Sleep-Aid). Over the counter medications with generic name beginning with the letter ‘D’ (DIPHENHYDRAMINE …

Diphenhydramine HCL is an antihistamine that has been shown to make you feel sleepy and help you relax with no lasting side effects. Unlike a more powerful prescription sleep aid, ZzzQuil is gentle and …