The autonomic nervous system is the part of the nervous system that controls muscles of internal organs (such as the heart, blood vessels, lungs, stomach, and intestines) and glands (such as salivary glands and sweat glands).
Naltrexone is also used to reduce cravings for alcohol. Scientists are unsure how it works in relation to alcohol but it has been shown to reduce desire and cravings by blocking the same receptors that create feelings of pleasure when opioids are taken.
A naltrexone implant is a small pellet that is inserted into the lower abdominal wall under local anesthetic. The implant is effective for 3-6 months depending on the type of implant used and releases a controlled amount of naltrexone into the body.The implant works by blocking the effects of opiate drugs.It does this by binding to opiate receptors in the body which prevents opiate drugs like heroin or oxycodone from causing a person to experience the usual high. In blocking the effectiveness of the drug, naltrexone helps to break the cycle of drug use.he implant works by blocking the effects of opiate drugs. It does this by binding to opiate receptors in the body which prevents opiate drugs like heroin or oxycodone from causing a person to experience the usual high. In blocking the effectiveness of the drug, naltrexone helps to break the cycle of drug use.