The problem with Seccy Vigil's reasoning is that since cannabis is illegal, and the federal govt has been the only one able to do any research, that reserch is pretty hard to come by.
I am fairly sure there are no studies on the effectiveness of marijuana on menstrual cramps, but women use it for that. I am sure there are no studies on ones ability ot withstand heat, sun, and hard labor while using cannabis either... But 9 out of 10 working men use it for that. We shouldnt have to wait for a study...If 100 people came in and said it helped that particular condition then THAT IS A STUDY IN ITSELF!
If cannabis helps one specific kind of arthritis, it helps them all. It is discomfort that it keeps at bay. Whether it is arthritis, back pain, nausea and illness from chemotherapy, or menstrual cramps it works the same.
We need a study on general day to day pain, fatigue, lonliness, fear, hunger, and sorrow. There would be no problem proving the effectiveness of marijuana for any of these conditions if the studies were there.