Maryland Code, Health Occupations § 12-506

(i) Attempts to obtain an authorization from the authorized prescriber; and

(ii) Is not able readily to obtain the authorization;

(4)(i) The drug or device is essential to the continuation of therapy in chronic conditions; and

(ii) In the pharmacist's professional judgment, the interruption of the therapy reasonably might produce an undesirable health consequence, be detrimental to the patient's welfare, or cause physical or mental discomfort;

(i) Enters on the back of the prescription or on another appropriate uniformly maintained, readily retrievable record, such as a medication record, the date and the quantity of the drug or device dispensed; and

(ii) Signs or initials the record; and