Which type of blocker is Propranolol categorized as?

Propranolol is categorized as a non-selective beta blocker, which means it inhibits both beta-1 and beta-2 adrenergic receptors. This broader action makes it useful for a variety of conditions including hypertension, anxiety, and certain types of tremors. By blocking beta-1 receptors in the heart, Propranolol reduces heart rate and myocardial contractility, leading to a decrease in cardiac output and lowering blood pressure. Additionally, by blocking beta-2 receptors in the smooth muscles of the airways, it may induce bronchoconstriction, which is a reason it must be used cautiously in asthmatic patients.

The other types of medications listed, such as selective beta blockers, calcium channel blockers, and ACE inhibitors, have different mechanisms of action that target specific receptors or pathways. Selective beta blockers only block beta-1 receptors and are typically used in managing conditions like heart failure or arrhythmias without affecting the beta-2 receptors, while calcium channel blockers are primarily for managing hypertension and angina by inhibiting calcium entry into cells. ACE inhibitors work on the renin-angiotensin-aldosterone system to lower blood pressure by preventing the conversion of angiotensin I to angiotensin II. Thus,