It is very important that your doctor check your progress while you are using this medicine. Blood tests may be needed to see if the medicine is working properly and to check for unwanted effects.
Using this medicine for a long time may cause muscle problems and serious kidney disease. Check with your doctor right away if you have a dark-colored urine; fever; joint pain; muscle cramps or spasms; or unusual tiredness or weakness.
Make sure any doctor or dentist who treats you knows that you are using this medicine. This medicine may affect the results of certain medical tests.