Hyzaar is a losartan and hydrochlorothiazide combination. Hydrochlorothiazide is a thiazide diuretic used for preventing the body to absorb too much salt, while that might cause fluid retention.
1. Losartan belongs to angiotensin II receptor antagonists and prevents blood vessels from narrowing, reducing blood pressure and improving blood flow. Hyzaar is used for treating hypertension, reducing the risk of stroke in people with heart disease, as well as for some other goals not listed in that guide.