Third known case of most probably a nonallergic generalized urticaria following the administration of cetirizine. – Clin Exp Dermatol 2002 May;27(3):185-7 — Urticarial intolerance reaction to cetirizine. — Schroter S, Damveld B, Marsch WC.
Avoid drinking alcohol if you are taking ceterizine. – Psychopharmacol 2002 Mar;16(1):57-64 — Effects of emedastine and cetirizine, alone and with alcohol, on actual driving of males and females. — Vermeeren A, Ramaekers JG, O’Hanlon JF.
Possible interaction between cetirizine and theophylline. – Am J Ther 1995 Jan;2(1):71-74 — Lack of Clinically Relevant Interaction of Cetirizine on Theophylline Disposition in Healthy Subjects: A Placebo-Controlled Study. — Hulhoven R, Desager JP, Harvengt C.
Consult with your physician before taking with other medications or herbs.