Apr 6, 2015 · I am Rx'd 180 10mg Opana per month + 30 40mg per month. (G74) 1. Shaved down, the medication isn't evenly distributed "per line" you cut to snort, so if you think you're only getting a few mgs per tiny line, don't be fooled. I've seen people with zero tolerance do a tiny line and almost OD. Be very, very cautious.