Olmesartan (Benicar®) belongs to the class of medicines called angiotensin II receptor antagonists to treat high blood pressure. It is marketed by Sankyo Pharma, Inc. Olmesartan works by blocking the action of angiotension II. As a result of this blockage, olmesartan restricts vasoconstriction and the secretion of aldosterone. This lowers blood pressure by producing vasodilation, and decreasing peripheral resistance.

Drugs.com - Benicar - Provides information regarding drug interactions, uses, and side effects.
Food And Drug Administration - Benicar Consumer Information - Patient FAQ in html format with a link to approved labeling (as pdf).
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