Description
What is Opana ER 40mg?
Opana ER 40mg is a potent extended-release formulation of oxymorphone hydrochloride, prescribed for the management of severe chronic pain that requires continuous, around-the-clock opioid treatment. It is not intended for as-needed pain relief or for mild pain conditions.
This formulation provides long-lasting pain control for patients who are opioid-tolerant, offering up to 12 hours of sustained analgesic effect. For a deeper understanding of how oxymorphone works, you can visit MedlinePlus: Oxymorphone Information.
How to Use Opana ER 40mg
Opana ER 40mg tablets should be taken exactly as prescribed by a licensed healthcare provider, every 12 hours, swallowed whole with water.
Do not crush, chew, or dissolve the tablet, as doing so can cause a rapid release of oxymorphone, leading to a potentially fatal overdose.
Patients are advised to start with the lowest effective dose to manage their pain and have the dosage adjusted carefully under medical supervision.
For clinical prescribing recommendations, refer to the CDC Opioid Prescribing Guidelines.
What is Opana ER 40mg Used For?
Opana ER 40mg is prescribed for the treatment of chronic, severe pain in patients who have developed tolerance to weaker opioid medications. It’s typically used for:
- Post-surgical or injury-related pain
- Cancer pain
- Neuropathic and long-term musculoskeletal pain
- Pain requiring continuous opioid therapy
To learn more about long-term opioid management, visit Mayo Clinic: Opioid Use and Chronic Pain.
Side Effects of Opana ER 40mg
Like other opioids, Opana ER 40mg may cause side effects, especially when misused or taken at higher doses than prescribed.
Common side effects include:
- Nausea or vomiting
- Drowsiness or dizziness
- Constipation
- Dry mouth
- Sweating
- Headache
Serious side effects include:
- Difficulty breathing or shallow breathing
- Severe drowsiness
- Confusion or hallucinations
- Seizures
- Slow heart rate
- Fainting
For a comprehensive list, refer to Drugs.com: Opana Side Effects.
Warnings and Precautions
- Do not consume alcohol while taking Opana ER, as it can cause fatal respiratory depression.
- Avoid operating heavy machinery or driving until you know how the drug affects you.
- The drug should not be taken if you have severe asthma, breathing problems, or a history of substance abuse.
- Use caution if you are taking benzodiazepines, sedatives, or antidepressants concurrently.
Visit FDA: Opioid Safety Information for detailed safety guidance.
How Long Does Opana ER 40mg Stay in Your System?
The half-life of oxymorphone is approximately 9 to 11 hours, depending on factors such as age, liver health, and metabolism.
After discontinuation, traces of the medication may remain detectable for up to 3–4 days in urine and blood.
For technical details, review Medscape: Oxymorphone Pharmacology.
Product Highlights
- Brand Name: Opana ER
- Strength: 40mg
- Active Ingredient: Oxymorphone Hydrochloride
- Form: Extended-Release Oral Tablet
- Intended Use: Chronic severe pain requiring continuous opioid therapy
- Duration: Up to 12 hours per dose
- Prescription Required: Yes
- Controlled Substance: Schedule II (High potential for abuse and dependence)





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