Naltrexone is a medication primarily used to help individuals overcome addiction to opioids and reduce cravings for alcohol. It works by blocking the effects of these substances in the brain, which can help prevent relapse in people recovering from addiction. Naltrexone is available in both pill and injectable forms, making it a flexible option for treatment. In addition to its use in addiction treatment, Naltrexone has been studied for other conditions, such as chronic pain and autoimmune disorders. It is generally well-tolerated, but some individuals may experience side effects like nausea or fatigue. Always consult a healthcare professional before starting any medication.