I had gastric bypass and a year later was found to have cancer. It is likely the cancer was found because of the bypass. My question and problem is that I have absorption problems with my pain medication which is understandable. I have read that others experience the same issues. It seems to me that the pain medication is more affective if I have a empty stomach. It also seems to last longer if I keep food out of my stomach. I have had a Dr. say that it would not work that way, but I find that Dr.s are not the best source for information in this area. I am fortunate to have a pain Dr. who does understand the medical facts in this area and he prescribes what most would find is too much. Trust me its not. I just hate the way society treats the use of pain medication these days. One of my biggest fears is my cancer will eventually take me to being in tremendous pain and I will be treated like some drug addict. In fact I will be relived when my daughter is 18 and I can place her in charge of my medical care should that be needed. Sad state of affairs when a cancer patient has to have this on their mind as a concern and issue.I am taking 30mg oxy, 8 mg dilaudid , and norco. So does anyone else notice having a empty stomach help with absorption of pain meds and keeping stomach empty increases length of time till medication wears off ?