Abstract: A prescription medium which provides visual correlation between a bio-affecting agent being prescribed and the application of a bio-affecting agent being prescribed. The prescription medium includes an entry space for prescriber identification, an entry space for identification of a patient, an entry space for identification of the bio-affecting agent being prescribed, and a plurality of visual indicia which identify the application for a class of agents. In completing the prescription medium, a prescriber selects one of the plurality of the indicia which properly correlates the bio-affecting agent being prescribed to its associated application. At the point where the pharmaceutical is being dispensed, the pharmacist again correlates the bio-affecting agent identified as that being prescribed with the selected indicia to confirm that the pharmaceutical being dispensed is that which is prescribed.