The article says he suffers from severe back pain and that he uses pot to relieve that pain. Now, does he just have the pain on weekends while relaxing at home? Does his pain go away when sitting at a computer for hours at the office? Isn't it remotly possible that this guy is just blowing smoke in more ways than one?
That said, I wasn't aware that marijuana relieved pain anyway. I'll try and find out.
The Institute of Medicine's 1999 report on medical marijuana stated, "The accumulated data indicate a potential therapeutic value for cannabinoid drugs, particularly for symptoms such as pain relief, control of nausea and vomiting, and appetite stimulation."
Source: Janet E. Joy, Stanley J. Watson, Jr., and John A Benson, Jr., "Marijuana and Medicine: Assessing the Science Base," Division of Neuroscience and Behavioral Research, Institute of Medicine (Washington, DC: National Academy Press, 1999).
Evidently it does.