1mg of oxymorphone is equal to about 2mg of oxycodone
1mg of oxycodone is equal to about .5 mg of oxymorphone
Oxycodone is half as potent, mg for mg.
So an 80mg oxycontin
would be roughly equal to a 40mg Opana ER
A 20mg Opana ER would be like a 40mg dose of oxycontin
Converting instant release release
oxycodone to Opana ER is different though. 15mg of oxycodone instant release
would be, in terms of potency, roughly equivalent to 15mg of Opana ER.