Md. Code, Criminal Law § 5–405

(a) Schedule IV consists of each controlled dangerous substance:

(1) added to Schedule IV by the Department under § 5–202(b) of this title; or

(2) designated as a Schedule IV controlled dangerous substance by the federal government unless the Department objects under § 5–202(f) of this title.

(b) The Department may not add a substance to Schedule IV under § 5–202 of this title unless the Department finds that:

(1) the substance has a low potential for abuse relative to the substances listed in Schedule III;

(2) the substance has currently accepted medical use in treatment in the United States; and

(3) abuse of the substance may lead to limited physical dependence or psychological dependence relative to the substances in Schedule III.