PPIs for most brand-name and generic drugs and for some supplements are available through DailyMed.
PPI's for some brand-name drugs are available in the Physician's Desk Reference (PDR). We do not have online access to the PDR, but the Library does have the current, printed, book version available for checkout.
PPIs only include information on the FDA-approved uses for a drug. They are manufacturer-specific, and, as such, are great sources of information about inactive ingredients (excipients).