Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
Although the majority of prescriptions with which the pharmacist is confronted are written by physicians, a prescription is a legal document written by a licensed medical practitioner. Furthermore, a prescription in effect constitutes an order from a dentist, physician, or veterinarian directing a licensed pharmacist to prepare medication for a person or animal to be given at a specified time and in the prescribed manner.
VanMeter, William G.
Iowa State University Veterinarian: Vol. 32
, Article 1.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol32/iss2/1