Drug Toxicity DB is a comprehensive, freely accessible Android application containing information on +11,200 drugs (including structure, CAS ID, description, classification, indications, toxicity and mechanism of action). Drug Toxicity DB combines detailed drug chemical and pharmacological data. Because of its broad scope, comprehensive referencing and unusually detailed data descriptions, Drug Toxicity DB is more akin to a drug toxicity than a drug database. Drug Toxicity DB can be used in the drug industry by medicinal chemists, pharmacists, physicians, students and the general public. Its extensive drug data has enabled the discovery and repurposing of a number of existing drugs to treat rare and newly identified illnesses.