In this article we will discuss about:- 1. Pharmacokinetics of Antihistamines 2. Pharmacological Actions of Antihistamines 3. Therapeutic Uses 4. Adverse Effects. Currently more than 24 antihistamine drugs are available. All antihistamines are of potential value in the treatment of allergies and choice depends on their duration of action, incidence of sedation and anticholinergic actions. […]