A conveyor apparatus and a method for supplying a medicine-solution mixture from a plurality of medicine-active ingredient solutions and additional solution constituents in a body by means of a plurality of feed devices is disclosed. The medicine-active ingredient solutions have different medicine-active ingredient parameters and constituents; the solution constituents have different parameters and constituents. The constituents of at least two medicine-active ingredient solutions and solution constituents are saved in at least one storage device; and are selected by means of one selection device for selection of at least one specific parameter and/or constituent of each medicine-active ingredient solution and/or the solution constituents. By means of a calculating device, at least one additional parameter from all selected parameters is calculated for the control and operation of at least one additional feed device for supplying at least one additional medicine-solution mixture to the body.