How does Metoprolol work?
Metoprolol is part of a class of drugs called beta blockers. They are named after the beta receptors, which are located in a number of places within the body, such as the heart and blood vessels. These beta receptors are what stress hormones (such as adrenaline) attach to, causing certain reactions in the body. These reactions can include increases in heart rate, the force with which the heart pumps blood and blood pressure (both systolic and diastolic).
Metoprolol helps to block a specific type of beta receptor called beta-1 receptors. By blocking them, the medication causes the reverse effect of these stress hormones. It decreases heart rate and both systolic and diastolic blood pressure, as well as the workload of the heart. This means that the heart requires less blood and oxygen to work properly.