Con

The Mar. 1999 U.S. Institute of Medicine (IOM) Report stated on Page 161:

The regular use of smoked marijuana would be contraindicated in a chronic condition like MS…

In general, the abundant anecdotal reports are not well supported by the clinical data… But this is due more to the limitation of the studies than to negative results…

Without an appropriate model, studies to determine the physiological basis for how marijuana or THC might relieve spasticity cannot be conducted. Nonetheless, the survey results suggest that it would be useful to investigate the potential therapeutic value of cannabinoids in relieving symptoms associated with MS.”

Mar. 1999 - “Marijuana and Medicine: Assessing the Science Base”