diphenhydramine

Etymology
From.

Noun

 * 1)  An antihistamine and anticholinergic drug that blocks the effect of histamine at  sites, relieving allergy symptoms. It also reduces smooth muscle contraction, increases heart rate, and sedates the user by blocking muscarinic acetylcholine receptors (s).

Translations

 * Chinese:
 * Mandarin: 苯海拉明
 * Czech: difenhydramin