Not seeking medical help if you can't breathe could be a slight death problem. If you are seriously struggling to breathe & having a drink of water & using your usual asthma medication isn't helping, then that is the obvious thing to do. You don't have to tell them it was your cocaine. I struggle to understand why if you 'go off the rails' if your cocaine is too strong, you don't just buy & take less of it instead of mixing it with stuff ....all sounds a bit dodge to me