Guide on Drug Elemental Impurities
Federal Register notice: FDA has made available a final guidance entitled “Q3D(R1) Elemental Impurities.” The International Council for Harmonization-prepared document revises the existing guidance “Q3D Elemental Impurities” and provides an updated permitted daily exposure for the cadmium inhalation route of exposure. The updated PDE of 3 micrograms/day is based on a modifying factor approach like that used for calculating the PDEs for the cadmium oral and parenteral routes of exposure. To view the notice, click here.