I have gastroparisis and after multiple tests the Dr put me on a powder mix , Colesteramine, twice daily. No matter what I eat I have diarrhea 20 to 30 minutes later. I have lost 22 lbs in 6 months and weigh 100 lbs. I am scared that I will keep loosing weight and end up in a hospital. I feel fine otherwise. My normal weight was 125 . I can't eat a large amount of food as I had bariatric surgery 7yrs ago and it was successful. I need help to gain weight.