Unless specifically excepted by state or federal law or regulation or more specifically included in another schedule, the following controlled substances are listed in Schedule III:
or any salt thereof and one or more other active medicinal ingredients which are not listed in any schedule;
or any salt of any of these drugs and approved by the Food and Drug Administration for marketing only as a suppository;
The commission may except by rule any compound, mixture, or preparation containing any stimulant or depressant substance listed in subsection (a)(1) and (2) [(1)(a) and (b)] 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 in combinations, quantity, proportion, or concentration that vitiate the potential for abuse of the substances having a stimulant or depressant effect on the central nervous system.
The controlled substances listed in this section may be added, rescheduled, or deleted as provided for in RCW 69.50.201.
RCW 69.50.208
Commission may change schedules of controlled substances: RCW 69.50.201.