By: Zwiener H.B. No. 4145 A BILL TO BE ENTITLED AN ACT relating to the prescription of a controlled substance to certain patients for the treatment of pain. BE IT ENACTED BY THE LEGISLATURE OF THE STATE OF TEXAS: SECTION 1. Subchapter C, Chapter 481, Health and Safety Code, is amended by adding Section 481.0725 to read as follows: Sec. 481.0725. PRESCRIPTION OF CONTROLLED SUBSTANCE AFTER DRUG TEST. A practitioner may not refuse to prescribe a controlled substance for the treatment of pain to a patient solely because the results of a drug test taken by the patient indicated that tetrahydrocannabinol or cannabidiol was present in the patient's body, or refuse to continue to treat the patient. SECTION 2. The change in law made by this Act applies only to a prescription issued on or after the effective date of this Act. A prescription issued before the effective date of this Act is governed by the law in effect on the date the prescription is issued, and the former law is continued in effect for that purpose. SECTION 3. This Act takes effect September 1, 2019.