... years, oxy's, and methadone, but I stopped taking them. I was in major pain yesterday and I ended up taking a 40 mg opana. I never take them, I'm not on them daily or anything, I just took one, for one day only, will I suffer withdraws from just taking the one pill that one day? I've heard alot of bad things about opana, so I'm just wondering if that's possible.?