I'm planning to consider medical cannabis from a nearby clinic in Ontario ( http://apollocannabis.ca/ ). I'm troubled with a severe migraine. I'm working in an MNC, dealing with a stressful job with many tasks. By the end of the day, I used to be very tired with a severe headache. I used to try painkillers but they just give a temporary relief. I would like to know in detail about medical marijuana. Can someone share your knowledge with me?