My sleeve surgery was 1-27-11 and had diarrhea almost everyday for 10 days then it stopped. 2 days later I had the worst bout of constipation I have ever had in my life. My doc advised Miralax which took about 5 hours to work but it did and I felt like a new person. For new patients I would definitelty have some on hand just in case, I will now incorporate some benefiber regularly to make sure it doesn't happen again! My nutritionist said it should get better once you incorporate some whole grains into your diet.