someone i know has mg and smokes mj everyday and he says it helps in almost everyway. the physical relaxing of your muscles is a good thing for mg since your immune system is creating chemicals to react with the actylcholine that is created for any muscle use. it helps with any of the gi problems with mestinon. it also regulates your appetite and sleep schedule if ur having problems with prednizone. one of the only downsides is the relative strain it puts on your lungs. i hope this helps