Section 4720 - Schedule IV(a) The controlled substances listed in this section are included in Schedule IV.(b) Any material, compound, mixture, or preparation which contains any quantity of the following substances having a potential for abuse associated with a depressant effect on the central nervous system: (c) The Secretary may except by rule any compound, mixture, or preparation containing any depressant substance listed in subsection (b) or subsection (l) of this section from the application of all or any part of this chapter if the compound, mixture, or preparation contains 1 or more active medicinal ingredients not having a depressant effect on the central nervous system and if the admixtures are included therein in combinations, quantities, proportions, or concentrations that vitiate the potential for abuse of the substances which have a depressant effect on the central nervous system.(e) Dextropropoxyphene, and any compound, mixture or preparation which contains any of this substance, including its salts.(f) Phentermine and any compound, mixture or preparation which contains any of this substance, including its salts.(g) Pentazocine, and any material, compound, mixture or preparation which contains any of this substance.(i) Pemoline (including organometallic complexes and chelates thereof).(j) A compound mixture or preparation containing not more than 1 milligram of Difenoxin and not less than 25 micrograms of Atropine Sulfate per dosage unit.(l) . Any material, compound, mixture, or preparation that contains benzodiazepine, including all of the following: Amended by Laws 2019, ch. 55,s 1, eff. 6/19/2019.16 Del. C. 1953, § 4720; 58 Del. Laws, c. 424, § 1; 71 Del. Laws, c. 295, § 2.;