Shares of the company briefly hit their lowest since May 2013 after the results, and closed 0.5 per cent lower.
Net loss was Rs 784 crore ($115.57 million) for the fiscal fourth quarter ended March 31, compared with a profit of Rs 380 crore a year earlier and an estimate of Rs 320 crore profit in a Thomson Reuters poll of 15 analysts.
One-time impairment charge was about Rs 1,464 crore on certain assets the company bought as part of the Gavis group acquisition.
Lupin, which specialises in oral contraceptives and drugs to treat diabetes and hypertension, said sales in the United States fell about 21.1 per cent to Rs 1,499 crore, while domestic sales climbed 13.5 per cent to Rs 965 crore.
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