What exactly is this drug?

[TJ]

Methylsulfonylmethane -- I looked this up on erowid, did a search on BL, found nothing. My friend was given this drug as a child some 30 or 40 years ago and was wondering what is in it? It used to knock him out. Appreciate any info....

 

[phase_dancer]

See this post

 

[txravegirl]

Try looking under this site as well see if it helps:
http://www.quackwatch.org/01QuackeryRelatedTopics/DSH/msm.html