constipation
"I've been taking opioids for knee surgery and they are the worst for causing constipation.  Despite taking stool softeners, senna laxatives, drinking prune juice daily and a high fiber diet, I could not get anything more than a tiny pebble to come out, and that was after straining so hard I got dizzy.  My 'roids were freaking out.  

Enemas sort of worked but they were very painful and I never felt completely empty afterward.  Since I'll be on meds for a few weeks I can't rely on them as a solution.  

After about 5 days of rocks for guts I finally found some irritable bowel forums with people swearing by milk of magnesia. So my husband ran to the pharmacy for me.

About 18 hours later the sky opened up and the angels sang.  Such relief!"