MJ, like opiates, probably has it's place in some treatments. i know of people with MS who claim relief from smoking marijuana.
there are some problems not only with the drug, but with the medical marijuana laws. i have observed in Oregon, that many doctors who prescribe pot are of the opinion that it is no worse than an after dinner drink. they will give it to patients with very little thought even though they would never prescribe opiates for the same patient. drug seekers find these docs, and pretty soon they have a booming pot prescription business going on.
other problems: smoking damages the lungs. the need ought to greatly outweigh the danger of lung damage. marijuana, as it is now sold, is not standardized. i may spend a great deal of money on an inferior product one time, and get the good stuff the next. because of that, it is hart to quantify the effects for each patient.
kids and pot: my youngest son grew up with 3 good friends. one went into the military right out of high school (2000). he has made SSGT. one went to college and got his degree. after that, he went into the coast guard. my son went to college and upon graduation, went into the navy. the last boy, went to college. in the first year, he hooked up with a girl who was heavily into pot. as far as i know, there were no other drugs involved. by the end of the year, his grades had dropped. by the end of the summer, he'd lost his job and could not pay for school. he is now back at home with his parents (also pot smokers) trying to figure out what to do with his life. can you blame marijuana for all of that? probably not, but it is a contributing factor. his grades dropped because he missed classes and fell behind. he lost his job because he either didn't show up to work, or was late. the sad thing is, he was the smartest of the 4 and i thought, had the best chance of going on for graduate work.
i know...it's one example...but show me a kid who is heavily into pot and is motivated and successful. show me an adult who is.
if we are going to use marijuana as a medical drug, then we need to regulate it as one. production needs to be standardized, and access limited to those who need it.