(a) The controlled substances listed in this section are included in Schedule III:

(1) Any material, compound, mixture, or preparation which contains any quantity of the following substances having a potential for abuse associated with a stimulant effect on the central nervous system:

a. Amphetamine, its salts, optical isomers, and salts of its optical isomers;

b. Phenmetrazine and its salts;

c. Any substance which contains any quantity of methamphetamine, including its salts, isomers, and salts of isomers;

d. Methylphenidate.

(2) Unless listed in another schedule, 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:

a. Any substance which contains any quantity of a derivative of barbituric acid, or any salt of a derivative of barbituric acid, except those substances which are specifically listed in other schedules;

b. Chlorhexadol;

c. Glutethimide;

d. Lysergic acid;

e. Lysergic acid amide;

f. Methyprylon;

g. Phencyclidine;

h. Sulfondiethylmethane;

i. Sulfonethylmethane;

j. Sulfonmethane.

(3) Nalorphine.

(4) Any material, compound, mixture, or preparation containing limited quantities of any of the following narcotic drugs or any salts thereof:

a. Not more than 1.8 grams of codeine or any of its salts, per 100 milliliters or not more than 90 milligrams per dosage unit, with an equal or greater quantity of an isoquinoline alkaloid of opium;

b. Not more than 1.8 grams of codeine or any of its salts per 100 milliliters or not more than 90 milligrams per dosage unit, with one or more active, nonnarcotic ingredients in recognized therapeutic amounts;

c. Not more than 300 milligrams of dihydrocodeinone or any of its salts per 100 milliliters or not more than 15 milligrams per dosage unit, with a fourfold or greater quantity of an isoquinoline alkaloid of opium;

d. Not more than 300 milligrams of dihydrocodeinone or any of its salts per 100 milliliters or not more than 15 milligrams per dosage unit, with one or more active, nonnarcotic ingredients in recognized therapeutic amounts;

e. Not more than 1.8 grams of dihydrocodeine or any of its salts per 100 milliliters or not more than 90 milligrams per dosage unit, with one or more active, nonnarcotic ingredients in recognized therapeutic amounts;

f. Not more than 300 milligrams of ethylmorphine or any of its salts per 100 milliliters or not more than 15 milligrams per dosage unit, with one or more ingredients in recognized therapeutic amounts;

g. Not more than 500 milligrams of opium per 100 milliliters or per 100 grams or not more than 25 milligrams per dosage unit, with one or more active, nonnarcotic ingredients in recognized therapeutic amounts;

h. Not more than 50 milligrams of morphine or any of its salts per 100 milliliters or per 100 grams with one or more active, nonnarcotic ingredients in recognized therapeutic amounts.

(b) The State Board of Health may except by rule any compound, mixture, or preparation containing any stimulant or depressant substance listed in subdivisions (1) and (2) of subsection (a) of this section from the application of all or any part of this chapter if the compound, mixture, or preparation contains one or more active medicinal ingredients not having a stimulant or depressant effect on the central nervous system and if the admixtures are included therein in combinations, quantity, proportion, or concentration that vitiate the potential for abuse of the substances which have a stimulant or depressant effect on the central nervous system.