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 has been used in 50 mg doses for decades to help patients recover from addiction to alcohol, heroin and other opiate drugs. However, more than 20 years ago it was discovered that very small doses of this drugâ3 to 4.5 mgâhave profound effects on the immune system.