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The external quality control program, developed by the Pan American Health Organization/World Health Organization (PAHO/WHO), evaluates the performance of the official laboratories for control of medicines. It has been active since December of 2001 with the assistance of The United States Pharmacopeia (USP).


  • Strengthening the performance in quality control tests;
  • Increase communication and exchange of information;
  • Harmonize methodologies to facilitate the acceptance/recognition among countries of the validity of the results obtained.