Tex. Health and Safety Code § 483.045: FORGING OR ALTERING PRESCRIPTION.

(a) A person commits an offense if the person:

(1) forges a prescription or increases the prescribed quantity of a dangerous drug in a prescription;

(2) issues a prescription bearing a forged or fictitious signature;

(3) obtains or attempts to obtain a dangerous drug by using a forged, fictitious, or altered prescription;

(4) obtains or attempts to obtain a dangerous drug by means of a fictitious or fraudulent telephone call; or

(5) possesses a dangerous drug obtained by a forged, fictitious, or altered prescription or by means of a fictitious or fraudulent telephone call.

(b) An offense under this section is a Class B misdemeanor unless it is shown on the trial of the defendant that the defendant has previously been convicted of an offense under this chapter, in which event the offense is a Class A misdemeanor.

Acts 1989, 71st Leg., ch. 678, Sec. 1, eff. Sept. 1, 1989.