terazosin dimer impurity dihydrochloride

Terazosin dimer impurity dihydrochloride, a dimeric form of Terazosin, is a chemical impurity found in Terazosin. Terazosin itself is a derivative of quinazoline and acts as a competitive and orally active α1-adrenoceptor antagonist[1].

Cetirizine Impurity B dihydrochloride (De(carboxymethoxy) Cetirizine Acetic Acid Dihydrochloride) is an impurity of Cetirizine dihydrochloride. Cetirizine is a second-generation antihistamine. Cetirizine is a specific, orally active and long-acting histamine H1-receptor antagonist. Cetirizine marks antiallergic properties and inhibits eosinophil chemotaxis during the allergic response.

Cetirizine Impurity C dihydrochloride, a specific impurity of Cetirizine, is associated with a second-generation antihistamine that serves as the carboxylated metabolite of hydroxyzine. This compound acts as a specific, orally active, and long-acting antagonist of the histamine H1-receptor [1] [2].

Fluticasone dimer impurity is a dimeric derivative of Fluticasone Propionate, a corticosteroid known for its high receptor affinity and potent topical activity.