FDA Warning Letter to Indoco Remedies Flags Lapses in Microbiological Testing, Aseptic Facilities

Indoco Remedies’ Goa Plant received a warning letter from the FDA following critical observations during an audit in July 2024. The violations of Current Good Manufacturing Practice (CGMP) observed include lapses in microbiology laboratory control, sterile area validation, smoke studies in ISO 5 areas and aseptic facilities, complaint handling, and failure of the Quality unit in reviewing Empower Error Messages.

FDA investigators observed numerous non-viable dark particles in the plates and filters used for microbiological testing. Additionally, the in-house prepared media plates did not possess the smooth surface needed to ensure maximum contact of filters to facilitate the growth of microorganisms present. The analysts failed to ensure adequate filter contact on the plates, which could compromise the accuracy of analysis. Indoco responded that it conducted a retrospective review of microbiological testing data and found that lapses such as uneven surfaces on media plates and air bubbles and analysts failing to ensure contact of filter on media were rare. However, the FDA considered the responses inadequate as they relied on documentation of events that were not being recorded by analysts. The FDA suggested a comprehensive independent review of all laboratory practices and conditions that could impact the accuracy of microbiology testing data.

The FDA also observed that the airflow studies performed in the ISO 5 area were deficient, and the airflow could not be visualized due to excess smoke. This was a repeat observation, and the FDA expressed concern that previous actions taken to prevent recurrence and the training given to personnel were inadequate. The FDA asked Indoco to reperform airflow visualization studies.

The warning letter also flagged inadequate investigation of repeat complaints of blockage of the dispensing tip, which was attributed to improper storage of the product by customers and the formation of a film. This explanation lacked scientific rationale. Additionally, repeat complaints of missing tips and empty vials were repeatedly determined to have no quality impact, even though this conflicted with the finished product quality attribute for fill volume.

It was also observed that the firm’s procedures governing chromatography analysis and review of audit trails were inadequate. Personnel were unaware of the requirement to review the Empower Message Centre data, and the firm did not review error messages and a high number of “User Abort” messages.

In its responses to the FDA, Indoco had proposed specific remediation for these violations. However, the FDA concluded that repeat failures and observations demonstrate that executive management oversight is inadequate, the firm does not operate an effective quality system, and the quality unit (QU) lacked authority and/or has insufficiently implemented its responsibilities. The FDA emphasized the need for Indoco’s executive management to comprehensively assess the company’s global manufacturing operations to ensure that systems, processes, and products conform to FDA requirements.

Inadequate Corrective Actions and Response

The warning letter offers several lessons. Unreliable impact assessments not supported by data and ineffective Corrective and Preventive Actions (CAPAs) do not satisfy the FDA. Another key point is that training by itself is not a CAPA; it is only an additional awareness-building program. If errors and deviations are repeated despite repeated training, it indicates that the real root cause lies elsewhere, and the investigations are inadequate to identify it. This also leads to the conclusion that the overall training program is ineffective, leaving firms to handle now two issues: inadequate investigation and ineffective training procedures and programs.

Indoco Warning Letter (December 2024)