Which of the following is NOT a common angiotensin receptor blocker (ARB)?

Propranolol is not a common angiotensin receptor blocker (ARB) because it belongs to a different class of medications known as beta-blockers. ARBs, such as losartan, valsartan, and telmisartan, work by blocking the angiotensin II receptor, which helps to lower blood pressure by preventing the effects of angiotensin II, a potent vasoconstrictor. This mechanism is particularly beneficial in managing conditions such as hypertension and heart failure.

In contrast, propranolol works by blocking beta-adrenergic receptors, which affects heart rate and myocardial contractility. While both classes of medications aim to improve cardiovascular health, their mechanisms of action and therapeutic uses differ significantly. Therefore, identifying propranolol as not being an ARB is correct, as it does not share the same pharmacological target as the other options listed.