Starting about 4 months ago (and not kicked-off by change in medication) I swell up like a balloon about 2 hours after meals, especially supper. Miserable feeling and can't get to sleep; wander about the house until 1 or 2 AM 80 years old & on carbidopa/levodopa since 1981. Currently taking: 85/700 Mg carb/levo (last 100 at 5 PM) 2.0 Mg Permax 40 Mg Propulsid Non-prescription stuff for chronic constipation Physically active --recently quit tennis because falling. Took up horseback riding, keeping eye on the ground for balance, instead of on the tennis ball. ANY IDEAS? PLEASE!