On 23 June 2006, the US Food & Drug Administration granted Ranbaxy a 180-day exclusivity period to sell simvastatin (Zocor) in the US as a generic drug at 80 mg strength. Ranbaxy competed with the maker of brand-name Zocor, Merck & Co.; IVAX Corporation (which was acquired by and merged into Teva Pharmaceutical Industries Ltd.), which has 180-day exclusivity at strengths other than 80 mg; and Dr. Reddy's Laboratories, also from India, whose authorized generic version (licensed by Merck) is exempt from exclusivity.