I have herniated discs At T-6, T-7, T-8, L-4,L-5 and S-1,. I also have spinal stenosis and arthritis through out my spine. I have back pain for the last 30 yrs. I have tried most of the muscle relaxants and I am now on flexeril 10mg TID. I have had steroids and anesthesia shots in my lower back 5 times with only minimal relief, they last about 4-5 weeks. I am 62 yrs old and my weight is 360 due to my inactivity. My question is ; are muscle relaxants reted by strength or for which ones work better than others.