Smoking coke will have no effect, you would need to convert it to crack. Then it would very addictive of course. I do not know of anyone who would combine the two though.
A dealer would be wasting/losing A LOT of money if he was lacing his bud with coke. I dont think its something you'll see very often if at all.
and that would bring us back to what poster #2 said ... it cant be smoked, unless its converted to a smokable form. crack. crack with weed is kinda funny, depends on how much crack and what kinda weed you have. If your just trying to smoke the crack with something, mixing it with tobacco cig is pretty common. just make your crack really fine like powder, empty some tobacco out and pour it in. move it around some so its falls in. remove filter replace with card-paper to keep it round. Smoke.. its sort of speedy and not as paranoia and smoking from straight hitter. putting it on weed in a bowl is alright. it helps if you bring your crack to the melting point in water, and then scoop the goo and let it dribble into the weed.. Not putting direct rocks on it. If you put direct rocks on the top, 1/2 your flame will destroy most your crack on the top. In order for it to smoke, it must melt right.. crack burning with weed has a very distinctive smell.
Yeah that's what I'am referring to. I remember hearing rapper Coolio talking about how it became popular in his area to put crack in marijuana joints back when crack first hit in the 80's. I was wondering what that high was like. I bet many became crackheads from doing that.