This chapter does not authorize a physician to prescribe or administer to a person a dangerous drug or controlled substance:

1. (1) for a purpose that is not a legitimate medical purpose as defined by the board; and
2. (2) if the physician knows or should know the person is using drugs for a nontherapeutic purpose.

Added by Acts 2003, 78th Leg., ch. 1276, Sec. 14.002(a), eff. Sept. 1, 2003.