There are specifically exempted from the provisions of this chapter and from the computation of the amount of tax imposed by it, gross receipts from the sale of drugs as defined by rule promulgated by the secretary of revenue pursuant to chapter 1-26 to the extent used by humans, if the drugs are prescribed by prescription, dispensed, or administered by a physician, chiropractor, optometrist, dentist, podiatrist, or audiologist.
SDCL 10-45-14.10