Wash. Rev. Code § 69.04.480
A drug or device shall be deemed to be misbranded if it is for use by human beings and contains any quantity of the narcotic or hypnotic substance alpha eucaine, barbituric acid, beta eucaine, bromal, cannabis, as that term is defined in RCW 69.50.101, carbromal, chloral, coca, cocaine, codeine, heroin, morphine, opium, paraldehyde, peyote, or sulphomethane; or any chemical derivative of such substance, which derivative has been designated as habit forming by regulations promulgated under section 502(d) of the federal act; unless its label bears the name and quantity or proportion of such substance or derivative and in juxtaposition therewith the statement "Warning-May be habit forming."
RCW 69.04.480
Intent-Finding- 2022 c 16: See note following RCW 69.50.101.