Propranolol.

Propranolol can be prescribed by your doctor if you have high blood pressure or other conditions, such as heart disease and abnormal heart rhythms. It works by slowing down the heartbeat and normalizing the blood flow. You may need to take propranolol if you have to keep your blood pressure under control. In that case you will most probably need to be taking this medicine for the rest of your life. This is why it's so important that you discuss all the possible drug interactions and contraindications with your doctor. Make sure you tell your health care provider if you also need to take reserpine, vitamins, allergies medications, high blood pressure meds, painkillers, medications for migraine headaches, heart disease medications, cough and cold medicines, or asthma meds, as interactions between the drugs mentioned and propranolol have been reported. Upset stomach, excessive tiredness, lightheadedness, constipation, rash, diarrhea, dizziness, vomiting, and difficulty sleeping are some of side effects you may get at the beginning of your treatment. Make sure you watch them closely until they disappear; if that doesn't happen – tell your doctor about them.