It is important that your doctor check your progress at regular visits while you are taking this medicine to make sure that this medicine is working properly. Blood and other tests for the heart may be needed to check for unwanted effects.
Make sure your doctor knows if you are pregnant or planning to become pregnant. Tell your doctor right away if you think you might be pregnant at any time while you are using this medicine. If you are pregnant, make sure your doctor knows if you also have high blood pressure. You and your doctor should discuss whether you should continue to take this medicine during pregnancy.
This medicine may cause some people to become drowsy, dizzy, or less alert than they are normally. Make sure you know how you react to this medicine before you drive, use machines, or do other jobs that require you to be alert.
Dizziness, lightheadedness, or fainting may occur, especially when you get up from a lying or sitting position. Getting up slowly may help.
Check with your doctor right away if you have symptoms of fainting, hallucinations (seeing, hearing, or feeling things that are not there), lightheadedness, stuffy nose, or racing heartbeat.
This medicine may increase your risk of having serious heart, kidney, lung, or stomach problems. Check with your doctor right away if you have chest pain or tightness; extreme tiredness; lower back or side pain; lump or tenderness in the stomach; persistent cough; shortness of breath; troubled breathing; or swelling in your hands, ankles, lower legs, or feet.
Also tell your doctor if you have persistent cough along with shortness of breath or troubled breathing while you are using this medicine. This could be symptoms of a serious lung disorder called pulmonary fibrosis.
Some people who have used this medicine had unusual changes in their behavior. Talk with your doctor if you start having problems with gambling or increased sex drive while using this medicine.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.