The issues that were raised included failure to clean, maintain, sanitise and sterilise equipment and utensils at appropriate intervals used for manufacturing of drugs at the facility, the United States Food and Drug Administration (USFDA) said.
USFDA investigators had inspected the company's drug manufacturing facility on December 7-16, 2016.
The letter also pointed out that the company does not have an adequate ongoing programme for monitoring process control to ensure stable manufacturing operations and consistent drug quality at Unit V facility at Jadcherla.
The regulator asked the company for an overall assessment of the adequacy of the cleaning programme for all equipment, with special emphasis on difficult-to-clean parts.
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It also asked the company to provide detailed retrospective review of all complaints, manufacturing, and laboratory investigations associated with each product it produces for the US market and all lots that were within expiry.
The USFDA asked Hetero to engage a qualified consultant to help meet CGMP (Current Good Manufacturing Practice) requirements and warned that it could withhold any new approvals from the company till all the violations are corrected.
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