The stock had opened on a bearish note at Rs 624 then touched an intra-day low of Rs 558.95 on the NSE. At close, the stock was quoted at Rs 640, down 4.70 per cent.
"Two of the Aarti Drugs facilities in Tarapur have received an import alert dated March 23, 2015 as per the FDA website," the company said in a regulatory filing.
"However, only one of that is US FDA facility. Second one, we had already delisted from the US FDA website couple of years back," it added.
One bonus equity share of Rs 10 each fully paid up for every one existing equity share of Rs 10 each fully paid up held in the company.
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The company, however, noted that this import alert would not affect the company's earnings.
"For the current financial year 2014-15, the total US sales contributes to slightly less than 1 per cent of the total sales volume. Hence this shouldn't affect our top-line and bottom-line significantly," the company said.
"We still have to receive an official communication from US FDA on the import alert after which we can take immediate actions to rectify the same," it added.