 Two days following disimpaction Part I of the clinical trial patients were assigned based on their randomisation number to receive either Movicol or Lactulose as maintenance therapy for the remainder of the study. At discharge all patients received the appropriate supply of study medication. This includes 1 weeks overage should they miss their next visit to the ProMotion clinic. They did not know whether they have been randomised to receive Movicol or Lactulose Dry. 