drug http://homosaurus.org/v2/drugs http://purl.obolibrary.org/obo/CHEBI_23888 http://purl.obolibrary.org/obo/NCIT_C1909 http://semanticscience.org/resource/SIO_010038 https://en.wikipedia.org/wiki/Category:Drugs https://en.wikipedia.org/wiki/Drug https://homosaurus.org/terms/drugs Any substance which when absorbed into a living organism may modify one or more of its functions. The term is generally accepted for a substance taken for a therapeutic purpose, but is also commonly used for abused substances. drug substance drugs pharmaceutical agent pharmacologic agent pharmacologic substance molecule Encyclopedia of Homosexuality LGBTQ America Today: An Encyclopedia Encyclopedia of Lesbian, Gay, Bisexual and Transgender History in America