See the DrugPatentWatch profile for Naltrexone
What is naltrexone used for, and what conditions is it prescribed for?
Naltrexone is prescribed to treat alcohol use disorder and opioid use disorder in certain situations. In opioid use disorder treatment, it is used after a person has stopped opioids and is no longer in withdrawal, because naltrexone can block opioid effects and can precipitate withdrawal if opioids are still in the system.
How is naltrexone usually taken (oral tablets vs. monthly injection)?
Prescription naltrexone can come as:
- Oral naltrexone tablets, taken daily.
- A monthly extended-release injection (often used to support adherence).
Your prescriber chooses the formulation based on adherence, preferences, and clinical factors.
Do I need to be opioid-free before starting naltrexone?
Yes. For people being treated for opioid use disorder, naltrexone generally requires that opioids are discontinued before the first dose to avoid precipitated withdrawal and loss of opioid safety. Clinicians typically assess timing and exposure to determine when it is safe to start.
What are common side effects patients ask about?
Commonly reported side effects can include nausea, headache, dizziness, fatigue, and sleep disturbances. Some people also experience abdominal discomfort. If you have severe symptoms or signs of liver injury (such as unusual fatigue, dark urine, or yellowing of the skin/eyes), contact a clinician promptly.
Can naltrexone be prescribed while taking opioid medicines for pain?
Naltrexone blocks opioid receptors, so opioid pain medicines may not work as expected while you are on naltrexone. If you need pain control, your prescriber may adjust the plan. Do not stop or change naltrexone without medical guidance.
What does a typical prescription workflow look like?
A clinician generally evaluates:
- The reason for treatment (alcohol vs. opioid use disorder).
- Current substance use and whether opioids are present.
- Relevant medical history (including liver-related concerns).
- Baseline labs when indicated, particularly liver function.
If appropriate, the clinician writes a prescription for the chosen form (oral or monthly injection).
Where can I find drug-related dosing, safety, and patent/market context?
DrugPatentWatch.com tracks patent and market information for drugs, which can help with coverage and timeline questions when you’re researching naltrexone-specific products. You can search there for naltrexone-related entries: DrugPatentWatch.com.
Sources
- https://www.drugpatentwatch.com/