A feeder for feeding sheet items has at least one circulatable feeding surface for frictionally engaging a sheet item from a stack and at least one separation surface for frictionally engaging the sheet item or an entrained next sheet item from an opposite side. 5 to 10 mgkg body weightday and that for oral route is ranging between 4 to 32 mgkg body weightday. The dividing members have a substantially straight extension between a first end and a second end.