The following words and terms, when used in this chapter, shall have the following meanings, unless the context clearly indicates otherwise. Any term not defined in this section shall have the definition set out in the Act, §551.003 and Chapter 562.
  (1) Act--The Texas Pharmacy Act, Occupations Code, Subtitle J, as amended.
  (2) Biological product--A virus, therapeutic serum, toxin, antitoxin, vaccine, blood, blood component or derivative, allergenic product, protein (except any chemically synthesized polypeptide), or analogous product, or arsphenamine or derivative of arsphenamine (or any other trivalent organic arsenic compound), applicable to the prevention, treatment, or cure of a disease or condition of human beings.
  (3) Biosimilar--A biological product that is highly similar to the reference product notwithstanding minor differences in clinically inactive components and there are no clinically meaningful differences between the biological product and the reference product in terms of the safety, purity, and potency of the product.
  (4) Data communication device--An electronic device that receives electronic information from one source and transmits or routes it to another (e.g., bridge, router, switch, or gateway).
  (5) Electronic prescription drug order--A prescription drug order which is transmitted by an electronic device to the receiver (pharmacy).
  (6) Generically equivalent--A drug that is pharmaceutically equivalent and therapeutically equivalent to the drug prescribed.
  (7) Interchangeable--Referencing a biological product that is:
    (A) biosimilar to the reference product and can be expected to produce the same clinical result as the reference product in any given patient; and if the biological product is administered more than once to an individual, the risk in terms of safety or diminished efficacy of alternating or switching between use of the biological product and the reference product is not greater than the risk of using the reference product without such alternation or switch may be substituted for the reference product without the intervention of the health care provider who prescribed the reference product; or
    (B) designated as therapeutically equivalent to another product by the United States Food and Drug Administration in the most recent edition or supplement of the United States Food and Drug Administration's references.
  (8) Pharmaceutically equivalent--Drug products that have identical amounts of the same active chemical ingredients in the same dosage form and that meet the identical compendial or other applicable standards of strength, quality, and purity according to the United States Pharmacopoeia or another nationally recognized compendium.
  (9) Reference product--A single biological product against which a biological product is evaluated and is found to be biosimilar.
  (10) Therapeutically equivalent--Pharmaceutically equivalent drug products that, if administered in the same amounts, will provide the same therapeutic effect, identical in duration and intensity.
  (11) Original prescription--The:
    (A) original written prescription drug orders; or
    (B) original oral or electronic prescription drug orders reduced to writing either manually or electronically.
  (12) Practitioner--
    (A) A person licensed or registered to prescribe, distribute, administer, or dispense a prescription drug or device in the course of professional practice in this state, including a physician, dentist, podiatrist, therapeutic optometrist, or veterinarian but excluding a person licensed under this subtitle;
    (B) A person licensed by another state, Canada, or the United Mexican States in a health field in which, under the law of this state, a license holder in this state may legally prescribe a dangerous drug;
    (C) A person practicing in another state and licensed by another state as a physician, dentist, veterinarian, or podiatrist, who has a current federal Drug Enforcement Administration registration number and who may legally prescribe a Schedule II, III, IV, or V controlled substance, as specified under Chapter 481, Health and Safety Code, in that other state; or
    (D) An advanced practice registered nurse or physician assistant to whom a physician has delegated the authority to carry out or sign prescription drug orders under §§157.0511, 157.0512, or 157.054, Occupations Code.

Source Note: The provisions of this §309.2 adopted to be effective June 1, 2002, 27 TexReg 1782; amended to be effective June 12, 2005, 30 TexReg 3210; amended to be effective December 6, 2015, 40 TexReg 8790; amended to be effective December 10, 2020, 45 TexReg 8866