Opana is a narcotic analgesic medication prescribed for individuals with chronic pain. It is an extended-release drug that changes the way the human body responds to pain. As of 2014, Opana is only available by prescription, and prescriptions are not refillable, according to MedlinePlus.
The active ingredient in Opana is oxymorphone, a drug that has the potential to slow the rate of breathing, making it inappropriate for people with asthma. A doctor normally starts his patient with a low dosage that he slowly increases until the patient's pain is gone. Building the dosage prevents some of the undesirable side effects while ensuring patients are not overmedicated, according to Drugs.com.
Opana is an addictive drug. Do not increase or decrease the dosage without a doctor's approval.