any drug which affects the mind in some way and is prohibited or under strict legal control in many countries owing to the social problems associated with its misuse, but which tends nevertheless to be extensively sold and used illegally, a substance which when swallowed, inhaled, or injected into the system induces drowsiness, sleep, stupefaction, or insensibility, according to its strength and the amount taken, aine (ravim), mida kasutatakse selle meeleolule suunatud mõju tõttu ilma meditsiinilise näidustuseta, psühhotoksiline aine, mis tekitab kergesti harjumuse ning haigusliku tungi seda ainet järjekindlalt tarvitada