Warning Letter ‘Top 10’ GMP Deficiencies

An analysis by the Germany-based ECA Academy of 42 FY 2022 FDA Warning Letters has identified the top 10 most frequently cited good manufacturing practice deficiencies. The 10 listed are:

  • responsibilities of the quality control unit (cited in 23 letters);
  • product record review (19 citations);
  • testing and release for distribution (17);
  • deviations from written procedures (16);
  • testing and approval or rejection of components, drug product containers, and closures (14);
  • equipment cleaning and maintenance (13);
  • stability testing (11);
  • general requirements (10);
  • automatic, mechanical, and electronic equipment (8);
  • design and construction features (4);
  • control of microbiological contamination (4); and
  • batch production and control records (4).

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