Angiotensin II receptor antagonists, or angiotensin receptor blockers (ARBs), are a group of pharmaceuticals which modulate the renin-angiotensin-aldosterone system. These drugs are AT₁-receptor antagonists - that is, they block the activation of angiotensin II AT₁ receptors. Angiotensin II receptor antagonists are primarily used for the treatment of hypertension where the patient is intolerant of ACE inhibitor therapy.

Examples include:

• irbesartan
• telmisartan
• losartan
• eprosartan
• candesartan cilexetil