Maybe if u were hyper sensitive to the effects of cocaine or had some other underlying problem.
My personal opinion? A healthy person will very likely not OD from sniffing 200 mgs of average street grade powder cocaine (which probably contains only 25 mgs of actual cocaine) and ofcourse assuming it's not cut with anything crazy like fentanyl analogues......which is actually happening in my area and crack with fent too, ppl dying, it's crazy.