Be sure to run this idea by your doctor, though, because there is a risk and you should avoid mixing sleeping pills and other substances.Tylenol PM® also uses an antihistimine to induce drowsiness.
Also called histamine antagonists, antihistamines are administered to fight allergic reactions, in which cases sleepiness is considered a possibly undesirable side effect.
Niaprazine was invented in France, and is used mainly in the European Union.
The main use for niaprazine is its intense sedative effect (as opposed to its antihistamine effects).
Antihistamines make your sleepy by antagonizing central histimine-1 (H-1) receptors in the brain.
The ones you see in over-the-counter sleep aids are usually diphenhydramine and hydroxyzine.