Discontinue use if any of the following side effects become bothersome: heartburn, drowsiness, fatigue, nausea, vomiting, irritability, mental changes, increased urine flow, itching, anorexia, pain, excessive sweating, Check with your physician if have ulcers, flushing, vision problems, irregular heartbeat, burning, redness of face, arms, chest, gout, liver or kidney problems, nerve damage, or serious allergic reactions. Stop taking two weeks before and after surgery. Interactions are possible with aspirin, acetaminophen (Tylenol) or related products, protease inhibitors, chemo meds, statins or other cholesterol lowering drugs. Also check with doctor if taking Digoxin, Dovonex, Neoral, Warfarin (coumadin), Zyloprim, Catapres, Benemid, Tegretol, Probenecid Dilantin and Corarone. If you have any questions or concerns about the use of this product seek medical advice prior to use.