Nomad is correct, you just did too much. A lot of first timers will underestimate the strength of opana and since they have to snort half an 80mg oxy they assume they have to snort half an opana...If you take too much of any narcotic you will either be puking your guts out or stop breathing. Next time, cut your dosage by about 70 to 80 percent, then if that doesn't do it, slowly add more, wait 10 minutes, rinse and repeat. You can always add more but you cannot take any away... oxymorphone must be handled with care...