Medical Information & Adverse Events for: LOTRONEX® (alosetron hydrochloride), Helidac® (bismuth subsalicylate/ metronidazole/ tetracycline/ hydrochloride), Imuran® (azathioprine), Ridura® (auranofin), Trandate® (labetalol hydrochloride), Zyloprim® (allopurinol), and Mercaptopurine - Call directly to (888) 423-5227 Opt. # 6.