The combined effect of tetrahydrocannabinol (THC) and cannabibidiol (CBD) is very effective against the obnoxious symptoms of multiple sclerosis (MS), while the side effect ("high") is low when compared with those of other costly and pretty much ineffective alternative treatments. Five out of six patients (more than 80%) report reduction in spasticity and improved mobility.
The use of cannabis as medicine has deep roots and is again being confirmed by modern science.
Shaheen E. Lakhan and Mary Rowland, Whole plant cannabis extracts in the treatment of spasticity in multiple sclerosis: a systematic review. BMC Neurology, 2009.
News article at Science Daily too.