For years cannabis helped me with anxiety : every time I smoked a joint a could easily get a high anxiety level or even sometimes a panic attack, it was really convincing !
Joking apart, years after that I think I finally understood why I suffered from anxiety with cannabis, and now it's true that it sometimes may be really relaxing.
Marijuana has thousands of virtues. It has always helped man on his journey to evolution. Strings, ships and houses were built with cannabis fiber. Cannabis seeds are a good food for humans and farm animals. Medically, it has a lot of different powers. And it may help you see things differently.
It increases the hunger, food cravings, which is good for anorexic people. It reduces pain. It reduces stress in a majority of cases. It inhibits vomiting reflexes.
It could be used today to reduce drastically pollution by replacing a lot of petroleum based products, like plastics and fuels.
With a touch of faith I'd say it's the sister of mankind.
Oh yeah but sorry no, I didn't tried it (and hope I don't have to) as a medicine.
For years people manipulated the strains to obtain high THC ratios, which is responsible for the most part of the "high" feeling, now for medical cannabis it is the CBD that looks interesting to scientists.
I also heard about a THCV which is maybe something unproved but said to be more present in ancient weed varieties, a compound which would counteract the "stressing" effects of THC.