Understanding Metoprolol: How It Works, Why It Helps, and Where Trouble Starts Metoprolol is a cardioselective beta-1 blocker that slows the heart’s response to adrenaline, easing the workload on the heart and lowering blood pressure. It’s a cornerstone for conditions like hypertension, angina, certain arrhythmias, and heart failure. By reducing heart rate and contractility, it…