(S)-Cetirizine (dihydrochloride)

(S)-Cetirizine dihydrochloride S)-P071) is an orally active antagonist of the histamine H1 receptor with a Ki value of 39.1 nM. (S)-Cetirizine dihydrochloride exerts anti-allergic activity by binding to the histamine H1 receptor and blocking the action of histamine. (S)-Cetirizine dihydrochloride is promising for research of allergic diseases such as allergic rhinitis.