I have a friend who has a social disorder called social anxiety disorder or social phobia. He told me about this theory of his. Basically, he thinks smoking marijuana aggravates his disorder. In fact, he's convinced of it. If he is correct, what does that say about marijuana?
For one, it says a lot of people who have had a bad experience from smoking marijuana might have mental disorders.
It also says, marijuana can be used in therapy to more quickly and accurately determine what a patient's disorder is, and how much the prescribed medication helps. Provided it aggravates every disorder out there. Otherwise, of course, it would have limited usefulness.
Let's assume marijuana aggravates every disorder. Why would it do so? If I remember correctly, marijuana injects the brain with a shot of a particular chemical. I don't remember the name of the chemical, but i'm pretty sure it starts with an 'A'. Is it possible this chemical acts as a sort of 'volume' knob? Meaning, if you add to this chemical, it will do things like aggravate a mental disorder. If you remove some of it, it will lessen the disorder. If this chemical is responsible, it means we could use something more specialized and precise than marijuana.
I can't say whether he's correct, but because of how beneficial it would be if he is, it is definitely something worth researching further.