There is a report from Australia on a few people with ALS and PLS who have been taking low dose naltrexone in the hope of halting disease progression. It gives mixed results but it's should be of interest to anyone who knows someone or has one of these diseases.
Since dextromethorphan, DM, (see Dextromethorphan thread here) is in the same class as naltrexone it could be worth looking at. I don't believe any doctor would recommend going down that route but who knows.
Ashley

Look at: NEW 2007 Update ALS & PLS
http://www.lowdosenaltrexone.org/others.htm#PLS2007