The Sun Pharmaceutical stock gained nearly seven per cent on Wednesday, after it announced the acceptance by the US Food and Drug Administration (FDA) for a new drug application (OTX-101) to treat dry eye disease. The Street expectation is that final approval for launch will be faster than current estimates of end-2018 or early 2019. Any launch ahead of the earlier estimates will not only give it a head start in a category with limited competition but help it fend off generic competition for a competing product, Allergan's Restasis.
Analysts believe Sun's product is better than Allergan's. However, new generic competition

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