“Pharmaceutical agent” means any topical or oral drug used or prescribed by a licensee for the examination, management or treatment of an abnormality, disease or condition of the eye or its appendages, including, without limitation, any analgesic drug subject to the requirements of NRS 636.2882 or added to schedule III, schedule IV or schedule V by the State Board of Pharmacy by regulation pursuant to NRS 453.146. The term does not include any drug or other substance added to schedule I or schedule II by the State Board of Pharmacy pursuant to that section.