It is very important that your doctor check the progress of you or your child at regular visits to make sure this medicine is working properly and to check for unwanted effects.
Metoprolol may worsen the symptoms of heart failure in some patients. Check with your doctor right away if you are having chest pain or discomfort; dilated neck veins; extreme fatigue; irregular breathing; an irregular heartbeat; shortness of breath; swelling of the face, fingers, feet, or lower legs; weight gain; or wheezing.
This medicine may cause changes in blood sugar levels. Also, this medicine may cover up the symptoms of low blood sugar, such as a rapid pulse rate. Check with your doctor if you or your child notice a change in your normal symptoms or a change in the results of your blood or urine sugar tests.
Make sure any doctor or dentist who treats you or your child knows that you are using this medicine. You may need to stop using this medicine several days before having surgery.
This medicine may cause some people to become less alert than they are normally. If this side effect occurs, do not drive, use machines, or do anything else that could be dangerous if you are not alert.
Dizziness, lightheadedness, or even fainting may occur when you get up suddenly from a lying or sitting position. Getting up slowly may help lessen this problem. Also, lying down for a while may relieve the dizziness or lightheadedness.
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.