I've had chronic back problems since around 25yrs old & I have not received a diagnosis of Crohn's Disease yet, but I believe I have it. When my stomach flares the back pain is worse. I take Norco for my back pain along with either Soma or Flexeril muscle relaxers & have also used Flector patches for pain & inflammation (which worked much better for me than the Lidocaine patches). I see a pain management doctor that also does the steroid injections into my lumbar region which gives some relief. Although, the last time I got the steroid injections more regularly I started having other weird autoimmune reactions & that's when they made me stop them & get tested further to make sure I didn't have any autoimmune disorders that the steroid injection were only aggrevating. After being tested for everything imaginable, with no answers still, I was cleared to go back & resume the steriod injections. I have hernated & bulging discs from T6 - T10 disc levels & at L4 - L5 along with SI nerve root empingement, degenerative disc disease & advanced facet joint disease. Also, my tail bone (coccyx) is about 45 degrees out of alignment. So I know exactly what you mean regarding the back issues of a 70yr old, I use a cane or even a walker to walk at times. As for your question regarding the pain killers, I believe any pain killer causes some il effect since they slow down the movements in every part of the body, mostly the stomach & intestines. At the same time, you have to weigh your own differences when choosing which avenue is best for you to pursue. Best of luck to you.