NCIt definition : A synthetic piperidinyl-benzimidazol derivative with antiallergic properties, Astemizole
acts as a reversible competitive inhibitor of histamine H1 receptors, with less anticholinergic
effects compared to related agents. It is a long-acting, non-sedative antihistaminic
used in the treatment of seasonal allergic rhinitis, asthma, allergic conjunctivitis,
and chronic idiopathic urticaria. (NCI04);