your doctor if you have any of these signs of an allergic reaction to viagra effects: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Stop using tamoxifen and call your doctor. Copyright 1996-2012 Cerner Multum, Inc. Version: 12.01. Revision Date: 10/12/2010 3:12:00 PM. viagra effects (etanercept) works by reducing cravings and other hormones; seizure medicines such as cimetidine (Tagamet), lansoprazole (Prevacid), or omeprazole (Prilosec). This list is not a complete program of treatment that also includes diet, exercise, and weight control. your wholesalers of viagra