1980s American Cars, Guns, Gadgets and Consumer Goods [Atmosphere, look, minutiae]

[Icelander]

Have we no older forumites who, for reasons which no one needs to inquire in if that is not desired, have some information about the dangers of American cocaine in the 1980s, the great cocaine decade?

I tried asking before, but no answer. As I'd really like to get in some discussion about this before the next session, I'll try again.

In our day, the trendy hazardous cutting or lacing agent in illicit cocaine is levamisole, which has caused several deaths. Of course, a famous one which is almost as old as drug legislation is strychnine, rat poison, which has been and is used to adulterate cocaine.

What chemicals might there be in 1988 cocaine from Florida, Montréal, Massaschuttes or New York that might cause dangerous side-effects to an otherwise healthy person?

Obviously, cocaine is not healthy even uncut, but assuming a habitual user, it's something he has survived so far. I'm looking for something more dangerous than a habitual couple of grams combined with heavy drinking. On the other hand, it can't hurt to get ideas on how cocaine (maybe laced with something) could plausibly accidentally kill a new user almost immediately, perhaps someone drunk who tries a single snort.

Are there any common household drugs or frequently used medications in the 80s which react violently to cocaine and/or common adulterants in it?