What Are The Health Risks Of Long-term Oxycodone Use For Back Pain?

I am a 60 year old male and I take Oxycodone for back pain and I have been taking them for several years . My question is what is the danger as I getting older (in my 60's) what if any is the danger in taking at my age . My doctor had me do a MRI and there are several problems in my back and they are tring exercises acupuncture alone with a tens t ome so where do indangering my heath by taking this medication at mmy age ?