Heroin - Definition

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Heroin, or diamorphine, is an opiate substance that acts on the central nervous system. Heroin can be used medicinally for coughs, insomnia, depression, pain relief, or diarrhea. However, due to its extremely addictive properties, heroin is more commonly taken as a recreational drug, and is illegal to sell. Heroin plunges those who abuse it into a state of extreme drowsiness and causes a loss of perception of pain or external stimuli.