Stomach/abdominal pain or cramping, nausea, diarrhea, or weakness may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
This medication may cause your urine to turn reddish-brown. This effect is harmless and will disappear when the medication is stopped.
If your doctor has directed you to use this medication, remember that he or she has judged that the benefit to you is greater than the risk of side effects. Many people who use this medication correctly do not have serious side effects.
Tell your doctor right away if any of these unlikely but serious side effects occur: persistent nausea/vomiting/diarrhea, muscle cramps/weakness, irregular heartbeat, dizziness, decreased urination, mental/mood changes (such as confusion).
A very serious allergic reaction to this drug is rare. However, seek immediate medical attention 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 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.