HYDERABAD, India--(BUSINESS WIRE)--Dr. Reddy’s Laboratories (NYSE: RDY) announced today that it has launched Montelukast Sodium Tablets (10 mg) and Montelukast Sodium Chewable Tablets (4 mg & 5 mg), bioequivalent generic versions of SINGULAIR® Tablets and Chewable tablets, in the US market on August 6, 2012 following the approval by the United States Food & Drug Administration (USFDA) of Dr. Reddy’s ANDA.