Pharmaceutical-grade lactose is highly pure lactose specifically produced to meet the standards of identity and purity set down in the lactose monographs of the various pharmacopoeia, including the United States Pharmacopoeia/National Formulary (USP/NF). Lactose is widely used as a filler or diluent in tablets and capsules, and to a more limited extent in lyophilized products, infant feed formulas, and a diluent in dry-powder inhalations.1-9