As used in this chapter , unless the context otherwise requires: 1. “Board” means the board of pharmacy. 2. “Controlled substance” means a controlled substance as defined in section 124.101 . 3. “Practitioner” means a practitioner as defined in section 155A.3 . 4. “Precursor substance” means a substance which may be used as a precursor in the illegal production of a controlled substance and is specified under section 124B.2 . 5. “Recipient” means a person in this state who purchases, transfers, or otherwise receives a precursor substance. 6. “Vendor” means a person who manufactures, wholesales, retails, or otherwise sells, transfers, or furnishes in this state a precursor substance. 90 Acts, ch 1251, §10 C91, §204B.1 C93, §124B.1 2007 Acts, ch 10, §16