Dopamine is a biochemical,and occurs bodies of living things, dopamine is one of the chemicals responsible forrunner's high.
But you can 'take' dope, by consumption of drugs like marujuana,which make you high by raising your dopamine levels.
Though it is possible to get unadulterated dope,it's very difficult, and worth a fortune, and though it won't harm you.
(1. you won't come across it often enough to get very addicted. 2.Addiction is the only recorded bad side-effect, but too much in one go will probebly kill you, anything can, even air.)
It's probebly illegal because it's urgently needed for treatment of patients in hospital.
People who do Marajuanna call Heroin Dope.
Word has also been used to describe how good somthing is.
OMG, I smoke the green but I don't do dope ( AKA Heroin )
Man that car is dope!
(& weed is not dope.)
2. Dope; cool, phat, hot or whatever you call it..