Tennessee Code Title 39. Criminal Offenses § 39-17-423

(1) Sell;

(2) Deliver; or

(3) Distribute a substance that is represented to be a controlled substance and which is substantially similar in color, shape, size, and markings or lack thereof, to a Schedule I, II, III or IV controlled substance as classified in §§ 39-17-406 -- 39-17-412, in order that the substance may be sold as a controlled substance.

(1) Any person who manufactures or sells a substance for use as a placebo by a licensed physician, dentist, pharmacist or registered nurse acting under the direction of a physician, dentist, or pharmacist;

(2) A licensed physician, dentist, pharmacist or registered nurse who sells, dispenses, administers or otherwise distributes a placebo to a patient of the physician or dentist for purposes of the medical care or treatment of the patient;

(3) A noncontrolled substance that was introduced into commerce prior to the introduction into commerce of the controlled substance that it is alleged to imitate;

(4) A substance that may be legally purchased at a drug or grocery store without a prescription; provided, that the substance is not represented by the seller to be a controlled substance; and

(5) A substance that is packaged and labeled in accordance with appropriate rules and regulations of the United States food and drug administration shall create a rebuttable presumption that the manufacturer or wholesaler of the substance is exempted from the provisions of this section.