Dr Reddy's Laboratories Ltd, India's second-largest drugmaker by sales, received a warning letter from the US Food and Drug Administration over inadequate quality control procedures at three manufacturing plants in India.
Dr Reddy's shares fell as much as 12 percent in early trade to their lowest level since July 30.
The warning letter was issued by the FDA to Dr Reddy's on Thursday for its Srikakulam, Miryalaguda and Duvvada drug manufacturing plants - all based in southern India.
The letter followed FDA inspections of these sites in November, January and February, and the company will respond to the agency in 15 days, Dr Reddy's said in a statement on Friday.
"We will continue to actively engage with the agency to resolve these issues," Dr Reddy's Chief Executive GV Prasad said in a statement.
Discover the latest Business News, Sensex, and Nifty updates. Obtain Personal Finance insights, tax queries, and expert opinions on Moneycontrol or download the Moneycontrol App to stay updated!
