Heart disease is common and you may not know you have it. Your doctor should slowly lower your dose over several weeks if you need to stop taking it. Limit physical activity while you are lowering your dose. If new or worsened chest pain or other pharmacy heart problems occur, contact your doctor right away. You may need to start taking betapace again. Lab tests, including heart function, kidney function, and blood pressure monitoring, may be performed while you use betapace. These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments. Pregnancy and breast-feeding: if you become pregnant, contact your doctor.