Teva Pharmaceutical

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has earned tentative approval from the U.S. Food and Drug Administration for its hypertension drug.The company expects a final approval for the 50 mg/12.5 mg and 100 mg/25 mg losartan potassium and hydrochlorothiazide tablets, a generic version of

Merck's

(MRK) - Get Report

Hyzaar tablets, once that drug's patent expires in April 2010.

Hyzaar's annual sales are about $542 million.

Teva's shares closed up 21 cents at $36.14 Wednesday.

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