The med is Naltrexone and LDN is Low Dose Naltrexone.

Naltrexone, at the higher doses 50 to 300mg is used as a narcotic/alcohol antagonist. In other words, it helps people get off of drugs/alcohol, by blocking endorphines

Dr Bernard Bahari, A New York Doc/Scientist, while searching for something to help Aids patients, discovered that Naltrexone, in small doses (1.75 to 5mg) not only helped some with Aids but also stopped/slowed MS progression in it's tracks.

By taking LDN sometime between 10pm and 1AM, it temporarily blocks endorphines, causing the endorphins to increase production during the wee morning hours.

Go to LDN Homepage for more info.