I have had 4 back surgeries and am in severe, chronic pain 24/7. I fall from the pain and sometimes pass out because it is so strong. I have an implanted Spinal Cord Stimulator and my dr. wants to implant a pump which I am not crazy about because of the medication severe side effects and problems w/the pump itself. I would like to try Levorphenol. Given my history,would it be helpful? Signed shortie