Diphenhydramine

**Definition:** A histamine H1 antagonist used as an antiemetic, antitussive, for dermatoses and pruritus, for hypersensitivity reactions, as a hypnotic, an antiparkinson, and as an ingredient in common cold preparations. It has some undesired antimuscarinic and sedative effects.

**Tree numbers:** - D02.092.471.320 - D02.455.426.559.389.115.250

**Synonyms:** - Diphenylhydramine - Benhydramin - Benzhydramine - Diphenylhydramin - 2-Diphenylmethoxy-N,N-dimethylethylamine