Question: is losartan potassium the same as losartan potassium hydrochlorothiazide?
Answer: Are Cozaar and Hyzaar the Same Thing? Cozaar (losartan) and Hyzaar (losartan potassium-hydrochlorothiazide) are prescribed for the treatment of hypertension. Hyzaar is also used to lower the risk of stroke in certain people with heart disease.