You don't say what her medical conditions are for which she takes so many medications. Cannabis is a great medicine for many illnesses, but there are a few for which it could potentially cause more problems than it solves. If she's a heart or lung patient, for instance, smoked cannabis can be risky.

If you live in a medical MJ state, then if she gets a card and goes to a dispensary, they can help her find the right strain to treat what she has. In a non-medical MJ state, such help is nearly impossible for people to get by simply buying what's available on the street.

How old are you? If you're mature enough to discuss medical cannabis with your mom you ought to be mature enough to own up to being a toker yourself. Up at the top of this forum is a sticky from Storm Crow containing cannabis health-related abstracts. Start by reading and researching those links, then begin printing articles and abstracts out and educating your mother. Make it clear that abstracts are only brief summaries, and take notice of the fact that many of the abstracts summarize rat and mouse studies, not human studies. So we can't always conclude that what's good for mice in studies with isolated THC compounds will translate to the same effects for humans with whole smoked or eaten cannabis.