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.
New Approaches Seek To Expand Naltrexone Use in Heroin Treatment. Naltrexone is a medication that is used in the treatment of opiate addiction and alcoholism. Recovering heroin addicts who take the medication cannot get high, even if they try to take heroin again; as a result, they are much less likely to use heroin.