RxImage API
The entire collection of image and metadata files is now available for download from the NLM Data Distribution webpage. While the RxImage API remains available, this new resource will greatly facilitate bulk download of the Pill Image Collection.
The Computational Photography Project for Pill Identification (C3PI) was discontinued in 2018. No new images will be added to the collection. Identifiers for pills will not be updated.
The RxImage Application Programming Interface (API) is an online resource from the National Library of Medicine (NLM) Lister Hill National Center for Biomedical Communications for searching and retrieving digital images and associated metadata for prescription oral solid dosage formulations (tablets, gel caps and capsules, etc. – commonly known as pills) from a publicly available, standardized, curated database.


A list of all parameters which can be used with the RxImage API can be found here: