Hi Barb To this non medically qualified person just reading the list gives me the heebie jeebies. I can speak about prepulsid /cisapride as I started on it this year. It is not for the PD except that it encourages proper digestion and thus better take up of the PD meds. It also stops reflux. It is to be taken half an hour before meals and at bed time. It is of some help with constipation. I dont recognise the carbi levo meds but they seem to be a low amount per day More Comments Anyone?? Anne Rutherford