Upset stomach may occur. If this effect persists or worsens, tell your doctor or pharmacist promptly.Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.Tell your doctor right away if you have any serious side effects, including: increased or severe bone/joint/muscle pain, new or unusual hip/thigh/groin pain, jaw pain, eye/vision problems.This medication may infrequently cause irritation and ulcers in your stomach or esophagus. Get medical help right away if any of these serious side effects occur: new/severe/worsening heartburn, chest pain, difficult or painful swallowing, severe stomach/abdominal pain, black/tarry stools, vomit that looks like coffee grounds.A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.In the US -Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.