(a) No person shall prescribe or order the dispensing of a dangerous drug, except a registered practitioner who is: (1) Licensed or otherwise authorized by this state to prescribe dangerous drugs; (2) Acting in the usual course of his professional practice; and (3) Prescribing or ordering such dangerous drug for a legitimate medical purpose. (b) Any person violating subsection (a) of this Code section shall be guilty of a misdemeanor. History. Code 1981, § 16-13-78.1, enacted by Ga. L. 1985, p. 1219, § 10.