Chlorpheniramine

**Definition:** A histamine H1 antagonist used in allergic reactions, hay fever, rhinitis, urticaria, and asthma. It has also been used in veterinary applications. One of the most widely used of the classical antihistaminics, it generally causes less drowsiness and sedation than PROMETHAZINE.

**Tree numbers:** - D03.383.725.620.150

**Synonyms:** - Chlorphenamine - Chlorprophenpyridamine