Propranolol belongs to a class of medicines called non-selective beta-adrenergic blockers, meaning it blocks beta-1 and beta-2 receptors in the heart and blood vessels. This reduces the effects of adrenaline, resulting in a slower heart rate, lower blood pressure, and decreased strain on the cardiovascular system.

Propranolol is available in various forms, including immediate-release tablets (10 mg, 20 mg, 40 mg, 80 mg) and extended-release capsules (60 mg to 160 mg). It can also be prescribed for conditions beyond heart disease, such as performance anxiety, tremors, migraines, and certain thyroid disorders.