My experience with using marijuana for my lumbar spinal stenosis....I grow my own plant (I live in B.C.!) and as neither of us smoke, I extract the bud in coconut oil. I was taking some every night but the fat upset me, so now I make rice krispie bars. I use only known varieties, and my favourite is Dutch Treat from Crop King. It is 8% CBD and 4% THC. I tried a variety that is 21% CBD and just 1/2% THC. It didn't work at all! I had to bum some straight THC from a friend and add it to my bud. I've been too cautious with using the marijuana, but as my pain is increasing, I'm experimenting with taking more at night. I'd like to hear from others who have used different strains for chronic pain, and their experiences.