Endo has been the major distributor of
oxymorphone throughout the world and currently markets
oxymorphone in the United States and elsewhere as Opana and Opana ER.
Opana is available as 5 mg and 10 mg tablets; Opana ER, an extended-release form of oxymorphone, is available as tablets in strengths of 5 mg, 7½ mg, 10 mg, 15 mg, 20 mg, 30 mg, and 40 mg.