Mumbai-based Lupin is the latest pharma major to have run into the US FDA wall. While its operating profit rose 73% to Rs.1,370 crore and revenues grew 34% to Rs.4,090 crore in Q4FY16, observations from the US drug regulator over its two plants have proved to be a dampener. In the past three months, the stock has corrected 22% from Rs.1,800 levels to around Rs.1,400 levels. Though the FDA recently gave clean chit to the two units, the company's plant in Goa continues to be under the regulator’s watch.