It is very important that your doctor check the progress of you or your child at regular visits to make sure that this medicine is working properly. Blood tests are needed to check for unwanted effects.
This medicine may cause unwanted effects on the heart. Check with your doctor right away if you or your child have chest pain or discomfort; decreased urine output; dilated neck veins; extreme fatigue; a fast, irregular, pounding, or racing heartbeat or pulse; irregular breathing; nausea; pain or discomfort in the arms, jaw, back or neck; shortness of breath; sweating; swelling of the face, fingers, feet, or lower legs; tightness in the chest; trouble with breathing; vomiting; weight gain; or wheezing. These could be symptoms of a serious heart problem.
Check with your doctor right away if you or your child have pain or tenderness in the upper stomach; pale stools; dark urine; a loss of appetite; nausea; unusual tiredness or weakness; or yellow eyes or skin. These could be symptoms of a serious liver problem.
Check with your doctor right away if you or your child have breathing problems, a cough, a fever, a fast heartbeat, or shortness of breath. These could be symptoms of a serious lung problem.
Do not stop using this medicine suddenly without checking first with your doctor. You may need to slowly decrease your dose before stopping it completely. To do so will cause the platelet level in your blood to increase quickly.
Do not take aspirin or aspirin-containing products since they may also affect your platelets. Do not take any 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.