IUPAC definition : 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. Synonymous with medicine,
pharmaceutical.;
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. Synonymous with medicine,
pharmaceutical.