Constipation was the most miserable part of the entire experience for me. I practically lived on the bathroom floor curled up in a fetal position -for months it seemed. There are prescription drugs that are more potent then the OTC ones. Get a consult with the nutritionist. Other steps to take are adding fiber to the diet (like metamucil), drinking lots of water 2-3 liters/day. The usual stuff - fruit, juices, prunes, etc. Avoid binding agents like cheese and rice.