After a weak opening, the stock further lost 5.94 per cent to Rs 764.20 a scrip as the trade progressed on BSE.
On NSE, it plunged 5.91 per cent to Rs 764.10 a share.
The bluechip stock was the worst performer among the Sensex and Nifty components during the morning session.
Country's largest drug maker Sun Pharmaceutical Industries yesterday reported a consolidated net profit of Rs 1,713.69 crore for the fourth quarter ended March 31, 2016.
The company had posted a net profit of Rs 889.24 crore for the same period of the previous fiscal, Sun Pharmaceutical Industries had said in a filing to the BSE.
For the fiscal year ended March 31, the company posted a net profit of Rs 4,715.91 crore. It was Rs 4,539.38 crore for the previous fiscal.
Consolidated total income of the company stood at Rs 28,728.95 crore in the just concluded fiscal as against Rs 27,842.84 crore a year ago.