US Prescription Drug Information Data Sources and Info

openFDA

https://open.fda.gov/apis/drug/

RxNav (National Library of Medicine (NLM))

Overview here

• RxNorm API to get data from the RxNorm data set (there is also a subset of this data available from the Prescribable RxNorm API
• RxClass API for looking up drug classes drugs within classes
  • For instance Find classes by RxNorm concept (rxcui parameter)
• Drug Interaction API for finding interactions between drugs

Misc.

• FDA List of Authorized Generic Drugs and FAQ about Generics
  • FDA Listing of Authorized Generics
• Forum post on technique to determine brand/generic status
• FDA Drug Approvals and Databases
• Medline Drug Info
• Dailymed Drug Info