Nytol is a sleep aid medication that is proven to help relieve temporary difficulties trying to get to sleep. Nytol works quickly and helps ensure that your sleep is undisturbed. Nytol Tablets contain the active ingredient Diphenhydramine Hydrochloride 50mg. Nytol is suitable for temporary sleep difficulties due to stress, jet leg, personal problems. Nytol is only for short term use and for over 18’s.