<<Disclaimer: Verify this information before applying it to your situation.>> This is the 4th day of my taking Actonel for Osteoporosis. Gradually, I've experienced severe lower back pain and tonight it is unbearable. Has anyone had similar experience? I'm 73 and biopsy diagnosed with Celiac Disease 12 years ago. I have been told since that I have an extra long colon. Is this unusual in Celiacs? I'll summarize. Margaret in Naples