Opana ER (oxymorphone hydrochloride extended-release) is a prescription opioid pain medication that was used to treat severe, chronic pain requiring continuous, long-term opioid therapy. The "ER" stands for extended-release, indicating that the medication is formulated to release its active ingredient slowly over time — typically 12 hours — to provide consistent pain relief. The 7.5 mg strength was one of the lower available dosages, intended for patients beginning therapy or transitioning from another opioid.
