This medication is a beta-blocker used to treat chest pain (angina) and high blood pressure. It is also used after an acute heart attack to improve survival. High blood pressure reduction helps prevent strokes, heart attacks and kidney problems. This drug works by blocking the action of certain natural chemicals in your body such as epinephrine on the heart and blood vessels. This results in a lowering of the heart rate, blood pressure, and strain on the heart. OTHER USES: This medication may also be used for irregular heartbeats, heart failure, migraine headache prevention, tremors and other conditions as determined by your doctor.

Take this medication by mouth, with or right after a meal, as directed by your doctor. Use this medication regularly in order to get the most benefit from it. To help you remember, use it at the same time(s) each day. This drug is not effective if you use it only when chest pain or a migraine headache occurs. It is very important to take this medication regularly as prescribed to help prevent these conditions. The dosage is based on your medical condition and response to therapy. It may take one or two weeks before the full benefit of this drug takes effect. It is important to continue taking this medication even if you feel well. Most people with high blood pressure do not feel sick.

You may experience dizziness, lightheadedness, drowsiness, tiredness, diarrhea, unusual dreams, trouble sleeping, or vision problems as your body adjusts to the medication. If any of these effects persist or worsen, notify your doctor or pharmacist promptly. This drug may reduce blood flow to your hands and feet, causing them to feel cold. Smoking may worsen this effect. Dress warmly and avoid tobacco use. Remember that your doctor has prescribed this medication because the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.