Yes quite a bit. It can really upset your stomach, and cause lots of constipation. And that can cause even more pain and gas.
I had 2 very bad cases of Autonomic Dysreflexia caused from gas. Having to call 911 and going into the ER. My blood pressure would not go down and my head hurt so bad I thought it was going to explode. And I felt like I couldn't get enough air to breath. Gas can really be a bummer (Ever see the movie The Last King of Scotland? Very funny gas scene/) Greg Has anyone drawn the conclusion that stomach gas, burping and pain is caused by morphine? Seems to me it might be so.

