Droga

Kofein u kafi je najrasprostranjenija psihoaktivna supstanca na svijetu

Droga je prirodna ili sintetička hemijska supstanca koja utiče na promjene u fiziološkim i psihičkim (intelektualnim, emocionalnim i motivacionim) funkcijama, bitno mijenja ponašanje.

Višekratna upotreba dovodi do navikavanja ili stvaranja (psihičke i/ili fizičke) ovisnosti. Uzimanje nekih droga (heroin, krek, kokain) dovodi brzo do stvaranja ovisnosti, a kada se naglo prestane s njihovim uzimanjem dolazi do apstinencijalnog sindroma.

Prema Svjetskoj zdravstvenoj organizaciji droga je "svaka supstanca, koja je u stanju da, kada se nađe u živom organizmu, modificira njegovu jednu ili više funkcija i da nakon ponovne upotrebe dovede do psihičke ili fizičke ovisnosti".

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