Alanil 180 mg is an antihistamine medication manufactured by ACME Laboratories Ltd., containing Fexofenadine Hydrochloride 180 mg per tablet. It is primarily used to alleviate symptoms associated with allergic conditions, such as seasonal and perennial allergic rhinitis and chronic idiopathic urticaria. Fexofenadine works by selectively blocking peripheral H₁ histamine receptors, thereby reducing the effects of histamine—a substance in the body that causes allergic symptoms.