Suggest Treatment For Neurogenic Bladder

1.My son is 10 years old. He had been operated for Menigomylocele when he was 6 months. Since then he has been suffering from Neurogenic bladder. He does not have full control over his urine. First, we used CIC to help him urinate but after he was operated for teethered chord about 2-1/2 years back, he was able to pass urine on his own but it requires some force from his side. He can t pass urine normally as we can. Is there any solution or surgery for Neurogenic Bladder? He also has problem in passing stools normally. He passes hard balls of stool and suffers with the problem of constipation. This problem may also be related to the Meningomylocele surgery. In a span of about 2-3 months, he suffers with pain in his abdomen and after about 1 hour of pain, he passes the normal stool. One Paediatrician advised Laxopeg but after giving Laxopeg the stools became a little watery and he started passing stools in his clothes/diapers. Then we stopped Laxopeg after 2-3 days. Should we continue giving him Laxopeg. Will this help in solving problem of constipation of my son OR what else may be the solution to this problem. We have also been advised for giving Anema after 4-5 days. Please help...