This one is from California but it is a rule set up by the FTC so it applies to all states. They aren't allowed to tell you no. That's ridiculous of them!
http://www.optometry.ca.gov/laws_reg...scriptions.pdf

And on page 17 of the Tennessee state guide below is the legal mumbo jumbo that says that they have to adhere to all federal statutes regarding release of prescriptions:

http://tennessee.gov/sos/rules/1045/1045-02.pdf