Maryland Code, Criminal Law § 5-503

(1) codeine; and

(2) a natural or synthetic compound, manufactured substance, salt, derivative, mixture, or preparation of opium.

(b)(1) Except on a valid prescription of an authorized prescriber as defined in § 12-101 of the Health Occupations Article, a person may not dispense, give, or sell a preparation containing opium or any of its derivatives.

(2) This subsection does not apply to:

(c)(1) Except on a prescription from an authorized prescriber as defined in § 12-101 of the Health Occupations Article, a person may not possess or control a preparation containing opium or its derivatives.

(2) A person may possess or control a preparation containing opium or its derivatives if the possession or control is in the regular course of lawful business, occupation, profession, employment, or duty of the person.

(1) for a first violation, a fine not exceeding $1,000;

(2) for a second violation, a fine not exceeding $2,000; or

(3) for each subsequent violation, imprisonment not exceeding 18 months.