Nifewick Retard 20 Tablet SR is a medication used to prevent angina (chest discomfort associated with the heart) and treat hypertension. Your heart will have an easier time pumping blood throughout your body if you take Nifewick Retard 20 Tablet SR. This lowers your risk of suffering a heart attack. If taken right after a heart attack, it can also lower the chance of death. Continue taking this medication even if you feel well because it must be taken consistently to be successful. Don't quit without consulting your physician.