Wash. Rev. Code § 70.54.140
No hospital or health facility may interfere with the physician/patient relationship by restricting or forbidding the use of amygdalin (Laetrile) when prescribed or administered by a physician licensed pursuant to chapter 18.57 or 18.71 RCW and requested by a patient under his/her care who has requested the substance after having been given sufficient information in writing to make an informed decision.
For the purposes of RCW 70.54.130 through 70.54.150, the pharmacy quality assurance commission shall provide for the certification as to the identity of amygdalin (Laetrile) by random sample testing or other testing procedures, and shall promulgate rules and regulations necessary to implement and enforce its authority under this section.
RCW 70.54.140