Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
Make sure your doctor knows if you are also using medicine to treat heart rhythm problems, such as amiodarone (Cordarone®), procainamide (Procan®, Procanabid®, Pronestyl®), quinidine (Cardioquin®, Quinaglute®, Quinidex®), or sotalol (Betapace®).
Make sure your doctor knows if you have kidney disease, liver disease, heart disease, heart rhythm problems (such as a prolonged QT interval), or a problem with minerals or electrolytes in the blood (such as calcium, magnesium, potassium, or sodium).
This medicine may decrease bone mineral density when used for a long time. A low bone mineral density can cause weak bones or osteoporosis. If you have any questions about this ask your doctor.
This medicine can cause a change in heart rhythm called prolongation of the QT interval. This condition may change the way your heart beats (faster or slower) and can cause chest pain, dizziness, fainting, or shortness of breath. Contact your doctor right away if you have any of these symptoms or any questions.
Your doctor will need to check your blood at regular visits while you are using this medicine. Be sure to keep all appointments.