Sec. 4.2. As used in this chapter, "compendium" refers to:
(1) the United States Pharmacopoeia;
(2) the Homeopathic Pharmacopoeia of the United States;
(3) the National Formulary;
(4) a drug approved by the federal Food and Drug Administration; or
(5) a supplement to a document specified in subdivision (1), (2), or (3).