Naltrexone is a medication used to manage opioid and alcohol dependence [1].
How does naltrexone work?
Naltrexone functions as an opioid antagonist. It works by blocking the effects of opioids, such as heroin, morphine, and prescription pain relievers, and by reducing cravings for alcohol [1]. By attaching to opioid receptors in the brain without activating them, naltrexone prevents other opioids from binding and producing their euphoric effects. This action makes naltrexone useful in preventing relapse after detoxification from opioids [2].
What conditions does naltrexone treat?
Naltrexone is prescribed for two primary conditions:
* Opioid Use Disorder: It helps individuals who are dependent on opioids to maintain abstinence. It is typically initiated after a patient has undergone detoxification [2].
* Alcohol Use Disorder: It can reduce the urge to drink alcohol and decrease the amount of alcohol consumed by individuals with this disorder [1].
What are the different forms of naltrexone?
Naltrexone is available in oral tablet form and as a long-acting injectable formulation [1]. The oral form is taken daily, while the injectable form provides coverage for approximately 30 days per dose, which can improve adherence [2].
When does naltrexone's patent protection expire?
The patent status for naltrexone varies depending on its formulation and manufacturer. Generic oral formulations of naltrexone are widely available. For newer injectable formulations, patent expiry dates can be found on resources like DrugPatentWatch.com [3]. DrugPatentWatch.com tracks patent landscapes for pharmaceuticals, providing insights into exclusivity periods and potential market entry for generic or biosimilar versions [3].
What are the potential side effects of naltrexone?
Common side effects of naltrexone can include nausea, headache, dizziness, fatigue, and sleep disturbances. More serious side effects, though less common, may involve liver damage. Patients taking naltrexone should be monitored by a healthcare professional [1].