Safety with Cocaine

[an_army_of_one]

I am new to this forum and I have been to many other online forums on many various topics. The new guy always makes the mistake of asking a question that has already been asked, probably, by a million guys before him. The thing is that those forums were about skateboarding or computer games, where in the real world probably don't involve too many life threatening repercussions when the question come up unaswered. With that said, please, help me ask this one, single, question, which could help me decide if my friend will wake up tomorrow, or the next morning after they have spent a night binging on a bunch of coke.

Question!

Is it unsafe to take a pill like Seroquel (Basically a Sedative) or to take a Klonopin, Clonazapam, Benzo...etc. about an hour after the person snorted about a half gram of coke, to make them fall asleep? Or will they Die?

Thanks for the help in advance because I need to help my friend out, and it would be nice if I could get some Yes and NO responses rather than open ended responses that never really give a clear, definitive answer.

With all thanks, from myself and my friend in need.