I wAs having issues with my BP being very high, he told me it was due to the pain and surgical meds. Had to increase fluids, should get at least 64 ounces per day. I purchased sugar free popsicles, they were a godsend! Sipped water every 15 to 20 minutes. Clear broth was ok as well. The gas is a monster, but it gets better after about one week. The gas alone caused me to cramp and think I was having a heart attack.....only walking every hour or so helped to eliminate it. Make sure you are walking frequently.