Table 4.

Examples of comprehensive online databases containing available drugs and their gene targets to aid drug repurposing efforts.

Name	Website address	Contents	Ref.
PROMISCUOUS	http://bioinformatics.charite.de/promiscuous	A database containing 25,000 annotated withdrawn or experimental drugs searchable by name, target, or pathway.	[141]
ChemSpider	http://www.chemspider.com	Free drug database containing 28 million structures searchable by calculated properties, structures, or drug ligands.	[152]
DrugBank	http://www.drugbank.ca	A comprehensive database hosted by the University of Alberta that contains 4,800 drugs including FDA-approved small drugs, natural agents, and experimental drugs and their sequence, structure, and target pathway.	[140]