What is the classification of Cozaar?

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Cozaar (losartan potassium) is classified as an angiotensin II receptor antagonist, also known as an angiotensin receptor blocker (ARB) ( and ). It belongs to a class of potent antihypertensive drugs that work by selectively binding to angiotensin II receptor sites, specifically the AT1 receptor subtype ( and ).
Interestingly, while Cozaar was developed in part to eliminate side effects associated with angiotensin-converting enzyme (ACE) inhibitors, such as cough and angioedema, there have been reported cases of angioedema induced by losartan (). This challenges the previous understanding of the role of bradykinin in angioedema pathogenesis, as ARBs like losartan do not affect bradykinin levels.
In conclusion, Cozaar (losartan) is primarily classified as an angiotensin II receptor antagonist used in the management of hypertension and heart failure (). Its mechanism of action involves blocking the effects of angiotensin II at the receptor level, rather than inhibiting its production like ACE inhibitors. This classification distinguishes it from other antihypertensive drug classes and highlights its unique approach to blood pressure management.