The company had posted a net profit of Rs 2,050.22 crore for the corresponding period of the previous fiscal, Sun Pharmaceutical Industries said in a statement.
Consolidated net sales of the company declined to Rs 6,803.31 crore for the quarter under consideration as against Rs 7,979.31 crore for the same period a year ago.
Commenting on the results, Sun Pharma Managing Director Dilip Shanghvi said: "Our performance for the quarter and first half FY16 has been impacted by lower sales growth, volatile currency movements and supply constraints."
The company's sales of branded formulations in India for the second quarter stood at Rs 1,819 crore, up 1 per cent from the corresponding quarter last year and accounted for 26 per cent of the total sales, Sun Pharma said.
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In the US, sales stood at USD 510 million for the quarter, down by 28 per cent, as against the same period of last year. The US sales accounted for 48 per cent of total revenues of the drug firm.
In the emerging markets, the company's sales stood at USD 140 million for the second quarter, down by 16 per cent from the corresponding quarter last year.
"The decline is the result of volatile currency movements in certain emerging markets and a strategic decision of not participating in low margin businesses," it added.
Formulation sales in Rest of World (ROW) markets excluding US and emerging markets, stood at USD 76 million in the period under review, down 30 per cent from the corresponding quarter last year.
The company has approved abbreviated new drug applications (ANDAs) for 445 products in the US, while filings for 154 products await US FDA approval. During the second quarter the company received four product approvals.