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 medicine that reduces your desire for alcohol. After you quit drinking, naltrexone may help you stay sober for a long time. This medicine is not a complete cure for alcoholism, but it can help you stop drinking while you get any other treatments that your doctor recommends.