We found that certain forms of marijuana -- pills and oral spray, primarily -- were useful in treating some systems of multiple sclerosis, especially spasticity, pain, central pain and painful spasms, and overactive bladder. Medical marijuana was not found to help tremor in multiple sclerosis, nor did it reduce other bladder symptoms. There wasn't enough information to comment on whether smoked marijuana was useful. There were only 2 studies, and no conclusions could be reached from them.
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