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.
Naltrexone is a medication that blocks the effects of drugs known as opioids (a class that includes morphine, heroin or codeine). It competes with these drugs for opioid receptors in the brain.o, naltrexone is only one component of a program of treatment for alcoholism including counseling, help with associated psychological and social problems and participation in self-help groups. In both studies where naltrexone was shown to be effective, it was combined with treatment from professional psychotherapists.