Well, opiate naive might be a stretch - more like opiate-reformed. I used to have a truly epic habit, but got 3 years clean, then a year chipping, followed by - currently - a few months clean. So I essentially have no tolerance currently. A friend gave me a 15 mg Opana (moon on it). I have never taken Opana before, all I know is that it is wicked strong. I do not shoot or snort, so what amount could I safely swallow without ODing? I've checked equiv charts and get too many different answers to feel safe trusting any of them.