Oxymorphone is sold under the brand name Opana ER. It is a medicine used for the treatment of severe and chronic pain. The generic name of Opana ER is Oxymorphone Hydrochloride Extended-Release.

It was developed by a team of scientists in Germany around 1914. It was first patented in 1955 and then approved to be used for medicinal use in 1959.

Oxymorphone can be consumed in three types:

Injection (The effect of the medicine shows up in just 5 to 10 minutes)
Immediate-release tablets (The impact of the treatment shows after 30 minutes)
Extended-Release Tablets (The effect of the treatment shows up after 12 hours and is usually taken once or twice a day)