Maryland Criminal Law Section 5-501

      (a)      Except as provided in subsection (b) of this section, a person may not dispense a controlled dangerous substance without a written prescription from an authorized provider if the substance is:

            (1)      listed in Schedule II; and

            (2)      a drug to which § 21-220 of the Health - General Article applies.

      (b)      A controlled dangerous substance to which subsection (a) of this section applies may be dispensed without a written prescription by:

            (1)      an authorized provider who:

                  (i)      is not a pharmacist; and

                  (ii)      dispenses the controlled dangerous substance directly to an ultimate user; or

            (2)      a pharmacist if:

                  (i)      an emergency exists;

                  (ii)      the pharmacist dispenses the drug under regulations of the Department on an oral prescription that the pharmacist reduces promptly to writing and keeps on file; and

                  (iii)      federal law authorizes the oral prescription.

      (c)      A prescription for a controlled dangerous substance listed in Schedule II shall be kept on file in conformity with the requirements for records and inventories under § 5-306 of this title.

      (d)      A person may not refill a prescription for a controlled dangerous substance listed in Schedule II.