Metoprolol (UK) is a selective beta-1 blocker primarily used to treat high blood pressure, chest pain (angina), and heart failure. It works by affecting the response to nerve impulses in certain parts of the body, slowing down the heart rate and making it easier for the heart to pump blood. This medication is essential for patients with cardiovascular conditions, helping to reduce the risk of heart attacks and strokes. Always follow your doctor's prescription for optimal results.