A drug that is dispensed under a prescription shall bear a label that states: The name and address of the dispenser; The serial number of the prescription; The date of the prescription or the date that the prescription was filled; The name of the prescriber; and If stated in the prescription: The name of the patient; Any directions for use; and Any cautionary statements. If a drug dispensed under a prescription meets the label requirements of this section, it is exempt from the provisions of: Section 21-217(b)(3) through (7) of this subtitle; and Section 21-218(b)(1) through (4), (7), (8), (13), and (14) of this subtitle. The exemptions under this section do not apply to any drug that is dispensed in the course of the conduct of a business of dispensing drugs on the basis of diagnosis made through the mail.