Opana ER oralOxyContin oralmethadone oralmorphine oraloxycodone oraltramadol oral0100200300400500600700800
less than 1 month1 to 6 months6 months to less than 1 year1 to less than 2 years2 to less than 5 years5 to less than 10 years10 years or moreTreatment Length by Drug