However I do feel that using slang terms in general connotes a negative stigma to drugs. People bust my balls for always calling weed, "Cannabis," but it rolls off the tongue and sounds pleasant to the ears.
You'd be surprised how many people in the world don't know wtf is Cannabis, but as soon as you say "Pot" or "Weed" they know. That's a problem, IMO.
People around where I live use slang terms for jwh. Mostly Synth and JayDubz. Jaydubz is my fave. or just synthetic. Slang names will naturally develop over time.