FDA Policy/General
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