My 23 mo. old grandson has very severe constipation that causes him to scream out in agony due to the size and that it's rock hard. His ped. sent us to a gastro. who put him on Miralax but this started to make him sick (throwing up) everytime he would take it. So they started him on benifiber which hasn't really started working yet. He refuses prunes or prune juice, even when it's mixed with something else. What else can we do? It just seems insane that nothing can be done and that this child is in such an uncomfortable state all the time, with the stomach cramps and the pain of actually going.