Maryland Criminal Law Section 5-504

      (a)      Except when dispensed directly to an ultimate user by an authorized provider who is not a pharmacist, a controlled dangerous substance listed in Schedule III or Schedule IV that is a drug to which § 21-220 of the Health - General Article applies may not be dispensed without a written or oral prescription.

      (b)      Unless renewed by the authorized provider, the prescription may not be:

            (1)      filled or refilled more than 6 months after the date of prescription; or

            (2)      refilled more than five times.