Wash. Rev. Code § 69.04.570
Except as permitted by chapter 69.77 RCW, no person shall introduce or deliver for introduction into intrastate commerce any new drug which is subject to section 505 of the federal act unless an application with respect to such drug has become effective thereunder. No person shall introduce or deliver for introduction into intrastate commerce any new drug which is not subject to section 505 of the federal act, unless (1) it has been found, by appropriate tests, that such drug is not unsafe for use under the conditions prescribed, recommended, or suggested in the labeling thereof; and (2) an application has been filed under this section of this chapter with respect to such drug: PROVIDED, That the requirement of subsection (2) of this section shall not apply to any drug introduced into intrastate commerce at any time prior to the enactment of this chapter or introduced into interstate commerce at any time prior to the enactment of the federal act: PROVIDED FURTHER, That if the director finds that the requirement of subsection (2) of this section as applied to any drug or class of drugs, is not necessary for the protection of the public health, he or she shall promulgate regulations of exemption accordingly.
RCW 69.04.570