In the letter to the company's Chief Executive Officer Deepak Rawat, the USFDA said inspectors during inspection from August 16 to 19, 2016, found "significant deviations" from current good manufacturing practice (CGMP) for active pharmaceutical ingredients (APIs) at the plant.
Elaborating on the violations at the plant, the USFDA noted that the company failed to validate and monitor the water purification system to ensure that water is of appropriate quality and suitable for its intended use.
The other violations include the firm's failure to prepare, review, and approve documents related to the manufacturing of APIs.
"Our investigators found a large number of trash bags behind a building on your property. The trash bags contained torn original laboratory and production records, such as analytical test reports, water testing reports, and sample notebooks," the US health regulator said.
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"Your quality unit did not investigate these discrepancies," the USFDA noted.
Besides, the inspectors identified failure on the part of the company to verify the suitability of analytical methods. Also, the firm failed to adequately investigate critical deviations, it said.
Until the company corrects all violations and deviations completely and the USFDA confirms its compliance with CGMP, it may withhold approval of any new applications, the regulator said.
Failure to correct these deviations may also result in FDA continuing to refuse admission of articles manufactured at the plant into the US, it added.