Are Psilocybin Mushrooms Legal in Washington? (2026)

Instrument

Schedule I, hallucinogenic substances

Source

https://app.leg.wa.gov/rcw/default.aspx?cite=69.50.204

Retrieved

2026-10-28

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(c) [(3)] Hallucinogenic substances. Unless specifically excepted or unless listed in another schedule, any material, compound, mixture, or preparation which contains any quantity of the following hallucinogenic substances, including their salts, isomers, and salts of isomers whenever the existence of those salts, isomers, and salts of isomers is possible within the specific chemical designation. For the purposes of this subsection only, the term "isomer" includes the optical, position, and geometric isomers:
(1) [(a)] Alpha-ethyltryptamine: Some trade or other names: Etryptamine; monase; a-ethyl-1H-indole-3-ethanamine; 3-(2-aminobutyl) indole; a-ET; and AET;
(2) [(b)] 4-bromo-2,5-dimethoxy-amphetamine: Some trade or other names: 4-bromo-2,5-dimethoxy-a-methylphenethylamine; 4-bromo-2,5-DMA;
(3) [(c)] 4-bromo-2,5-dimethoxyphenethylamine: Some trade or other names: 2-(4-bromo-2,5-dimethoxyphenyl)-1-aminoethane; alpha-desmethyl DOB; 2C-B, nexus;
(4) [(d)] 2,5-dimethoxyamphetamine: Some trade or other names: 2,5-dimethoxy-a-methylphenethylamine; 2,5-DMA;
(5) [(e)] 2,5-dimethoxy-4-ethylamphetamine (DOET);
(6) [(f)] 2,5-dimethoxy-4-(n)-propylthiophenethylamine: Other name: 2C-T-7;
(7) [(g)] 4-methoxyamphetamine: Some trade or other names: 4-methoxy-a-methylphenethylamine; paramethoxyamphetamine, PMA;
(8) [(h)] 5-methoxy-3,4-methylenedioxy-amphetamine;
(9) [(i)] 4-methyl-2,5-dimethoxy-amphetamine: Some trade and other names: 4-methyl-2,5-dimethoxy-a-methylphenethylamine; “DOM”; and “STP”;
(10) [(j)] 3,4-methylenedioxy amphetamine;
(11) [(k)] 3,4-methylenedioxymethamphetamine (MDMA);
(12) [(l)] 3,4-methylenedioxy-N-ethylamphetamine, also known as N-ethyl-alpha-methyl-3,4(methylenedioxy)phenethylamine, N-ethyl MDA, MDE, MDEA;
(13) [(m)] N-hydroxy-3,4-methylenedioxyamphetamine also known as N-hydroxy-alpha-methyl-3,4(methylenedioxy)phenethylamine,N-hydroxy MDA;
(14) [(n)] 3,4,5-trimethoxy amphetamine;
(15) [(o)] Alpha-methyltryptamine: Other name: AMT;
(16) [(p)] Bufotenine: Some trade or other names: 3-(beta-Dimethylaminoethyl)-5-hydroxindole; 3-(2-dimethylaminoethyl)-5-indolol; N, N-dimethylserotonin; 5-hydroxy-N,N-dimethyltryptamine; mappine;
(17) [(q)] Cannabis;
(18) [(r)] Diethyltryptamine: Some trade or other names: N,N-Diethyltryptamine; DET;
(19) [(s)] Dimethyltryptamine: Some trade or other names: DMT;
(20) [(t)] 5-methoxy-N,N-diisopropyltryptamine: Other name: 5-MeO-DIPT;
(21) [(u)] Ibogaine: Some trade or other names: 7-Ethyl-6,6 beta,7,8,9,10,12,13,-octahydro-2-methoxy-6,9-methano-5H-pyndo (1',2' 1,2) azepino (5,4-b) indole; Tabernanthe iboga;
(22) [(v)] Lysergic acid diethylamide;
(23) [(w)] Mescaline;
(24) [(x)] Parahexyl-7374: Some trade or other names: 3-Hexyl-1-hydroxy-7, 8, 9, 10-tetrahydro-6, 6, 9-trimethyl-6H-dibenzo[b,d]pyran; synhexyl;
(25) [(y)] Peyote, meaning all parts of the plant presently classified botanically as Lophophora Williamsii Lemaire, whether growing or not, the seeds thereof, any extract from any part of such plant, and every compound, manufacture, salts, derivative, mixture, or preparation of such plant, its seeds, or extracts; (interprets 21 U.S.C. Sec. 812 (c), Schedule I (c)(12));
(26) [(z)] N-ethyl-3-piperidyl benzilate;
(27) [(aa)] N-methyl-3-piperidyl benzilate;
(28) [(bb)] Psilocybin;
(29) [(cc)] Psilocyn;
(30) [(dd)](i) Tetrahydrocannabinols, meaning tetrahydrocannabinols naturally contained in a plant of the genera Cannabis, as well as synthetic equivalents of the substances contained in the plant, or in the resinous extractives of the genera Cannabis, and/or synthetic substances, derivatives, and their isomers with similar chemical structure and pharmacological activity such as the following:
(A) 1 - cis - or trans tetrahydrocannabinol, and their optical isomers, excluding tetrahydrocannabinol in sesame oil and encapsulated in a soft gelatin capsule in a drug product approved by the United States Food and Drug Administration;
(B) 6 - cis - or trans tetrahydrocannabinol, and their optical isomers;
(C) 3,4 - cis - or trans tetrahydrocannabinol, and its optical isomers; or
(D) That is chemically synthesized and either:
(I) Has been demonstrated to have binding activity at one or more cannabinoid receptors; or
(II) Is a chemical analog or isomer of a compound that has been demonstrated to have binding activity at one or more cannabinoid receptors;
(Since nomenclature of these substances is not internationally standardized, compounds of these structures, regardless of numerical designation of atomic positions covered.)
(ii) Hemp and industrial hemp, as defined in RCW
15.140.020
, are excepted from the categories of controlled substances identified under this section;
(31) [(ee)] Ethylamine analog of phencyclidine: Some trade or other names: N-ethyl-1phenylcyclohexalymine, (1-phenylcyclohexl) ethylamine; N-(1-phenylcyclohexyl)ethylamine; cyclohexamine; PCE;
(32) [(ff)] Pyrrolidine analog of phencyclidine: Some trade or other names: 1-(1-phencyclohexyl)pyrrolidine; PCPy; PHP;
(33) [(gg)] Thiophene analog of phencyclidine: Some trade or other names: 1-(1-[2-thenyl]-cyclohexly)-pipendine; 2-thienylanalog of phencyclidine; TPCP; TCP;
(34) [(hh)] 1-[1-(2-thienyl)cyclohexyl]pyrrolidine: A trade or other name is TCPy.

Instrument

Schedule III; depressants

Source

https://app.leg.wa.gov/RCW/default.aspx?cite=69.50.208

Retrieved

2026-10-31

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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:
(b) [(2)] Depressants. Unless specifically excepted or unless listed in another schedule, any material, compound, mixture, or preparation which contains any quantity of the following substances having a depressant effect on the central nervous system:
(1) [(a)] Any compound, mixture, or preparation containing:
(i) Amobarbital;
(ii) Secobarbital;
(iii) Pentobarbital;
or any salt thereof and one or more other active medicinal ingredients which are not listed in any schedule;
(2) [(b)] Any suppository dosage form containing:
(i) Amobarbital;
(ii) Secobarbital;
(iii) Pentobarbital;
or any salt of any of these drugs and approved by the Food and Drug Administration for marketing only as a suppository;
(3) [(c)] Any substance which contains any quantity of a derivative of barbituric acid, or any salt of a derivative of barbituric acid;
(4) [(d)] Chlorhexadol;
(5) [(e)] Embutramide;
(6) [(f)] Any drug product containing gamma hydroxybutyric acid, including its salts, isomers, and salts of isomers, for which an application is approved under section 505 of the federal food, drug, and cosmetic act;
(7) [(g)] Ketamine, its salts, isomers, and salts of isomers, some other names for ketamine: (<plus-minus>)-2-(2-chlorophenyl)-2-(methylamino)-cyclohexanone;
(8) [(h)] Lysergic acid;
(9) [(i)] Lysergic acid amide;
(10) [(j)] Methyprylon;
(11) [(k)] Sulfondiethylmethane;
(12) [(l)] Sulfonethylmethane;
(13) [(m)] Sulfonmethane;
(14) [(n)] Tiletamine and zolazepam or any of their salts
—
some trade or other names for a tiletamine-zolazepam combination product: Telazol, some trade or other names for tiletamine: 2-(ethylamino)-2-(2-thienyl) cyclohexanone, some trade or other names for zolazepam: 4-(2-fluorophenyl)-6,8-dihydro-1,3,8-trimethylpyrazolo-[3,4-e][1,4]-diazepin-7(1H)-one flupyrazapon.

Instrument

Controlled substance analog treated as Schedule I (deeming clause) and the controlled-substance-analog definition

Source

https://app.leg.wa.gov/rcw/default.aspx?cite=69.50.214

Retrieved

2026-07-20

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RCW 69.50.214. Controlled substance analog. A controlled substance analog, to the extent intended for human consumption, shall be treated, for the purposes of this chapter, as a substance included in Schedule I. Within thirty days after the initiation of prosecution with respect to a controlled substance analog by indictment or information, the prosecuting attorney shall notify the commission of information relevant to emergency scheduling as provided for in RCW 69.50.201(e). After final determination that the controlled substance analog should not be scheduled, no prosecution relating to that substance as a controlled substance analog may continue or take place.
RCW 69.50.101(16)(a). “Controlled substance analog” means a substance the chemical structure of which is substantially similar to the chemical structure of a controlled substance in Schedule I or II and: (i) that has a stimulant, depressant, or hallucinogenic effect on the central nervous system substantially similar to the stimulant, depressant, or hallucinogenic effect on the central nervous system of a controlled substance included in Schedule I or II; or (ii) with respect to a particular individual, that the individual represents or intends to have a stimulant, depressant, or hallucinogenic effect on the central nervous system substantially similar to the stimulant, depressant, or hallucinogenic effect on the central nervous system of a controlled substance included in Schedule I or II.

Instrument

Nitrous oxide - Sale or distribution prohibited - Penalty - Exceptions

Source

https://app.leg.wa.gov/RCW/default.aspx?cite=69.58&full=true

Retrieved

2026-10-31

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(1) Every person who sells, furnishes, administers, distributes, gives away, or offers to sell, furnish, administer, distribute, or give away a device, canister, tank, or receptacle either exclusively containing nitrous oxide or flavored nitrous oxide or exclusively containing a chemical compound mixed with nitrous oxide, is guilty of a gross misdemeanor.
(2) This section does not apply to any person who administers nitrous oxide for the purpose of providing medical, veterinary, or dental care, if administered by a medical, veterinary, or dental practitioner licensed by this state or at the direction or under the supervision of a practitioner licensed by the state.
(3) This section does not apply to the sale of nitrous oxide contained in food products for use as a propellant.
(4) This section does not apply to the sale and use of nitrous oxide by a manufacturer as part of a manufacturing process or industrial operation.
(5) This section does not apply to the filling of cylinders of nitrous oxide for the subsequent sale, furnishment, or distribution of nitrous oxide by a person or entity engaged in lawfully distributing medical, veterinary, dental, food-grade, industrial, or automotive gases, when the nitrous oxide is sold, furnished, or distributed solely for a purpose exempt under this section, provided that the cylinders are not for personal use.
(6) This section does not apply to the sale and use of nitrous oxide for automotive purposes.
(7) As used in this section, "nitrous oxide" refers to any of the following substances: N20, dinitrogen monoxide, dinitrogen oxide, nitrogen oxide, or laughing gas.

Instrument

Sale of certain substances prohibited, when

Source

https://app.leg.wa.gov/rcw/default.aspx?cite=9.47A.040

Retrieved

2026-10-31

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RCW  9.47A.040

Sale of certain substances prohibited, when.

No person may sell, offer to sell, deliver, or give to any other person any container of a substance containing a solvent having the property of releasing toxic vapors or fumes, if he or she has knowledge that the product sold, offered for sale, delivered, or given will be used for the purpose set forth in RCW
9.47A.020
.
[
2011 c 336 s 307
;
1984 c 68 s 4
;
1969 ex.s. c 149 s 4
.]

Instrument

Schedule I, hallucinogenic substances

Source

https://app.leg.wa.gov/WAC/default.aspx?cite=246-945-051

Retrieved

2026-11-06

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(3) Hallucinogenic substances. Unless specifically exempted or unless listed in another schedule, any material, compound, mixture, or preparation which contains any quantity of the following hallucinogenic substances, or which contains any of its salts, isomers, and salts of isomers, whenever the existence of such salts, isomers, and salts of isomers is possible within the specific chemical designation. For purposes of this subsection only, the term "isomer" includes the optical, position, and geometric isomers:
(a) 1-(1,3-benzodioxol-5-yl)-2-(methylamino)butan-1-one; some other names: Butylone and bk-MBDB;
(b) 1-(1,3-benzodioxol-5-yl)-2-(methylamino)pentan-1-one; some other names: Pentylone and bk-MBDP;
(c) 2-(2,5-Dimethoxy-4-(n)-propylphenyl)ethanamine; some other names: 2C-P;
(d) 2-(2,5-Dimethoxy-4-ethylphenyl)ethanamine; some other names: 2C-E;
(e) 2-(2,5-Dimethoxy-4-methylphenyl)ethanamine; some other names: 2C-D;
(f) 2-(2,5-Dimethoxy-4-nitrophenyl)ethanamine; some other names: 2C-N;
(g) 2-(2,5-Dimethoxyphenyl)ethanamine; some other names: 2C-H;
(h) 2-(4-bromo-2,5-dimethoxyphenyl)-N-(2-methoxybenzyl)ethanamine; some other names: 25B-NBOMe and 2C-B-NBOMe;
(i) 2-(4-Chloro-2,5-dimethoxyphenyl)ethanamine; some other names: 2C-C;
(j) 2-(4-chloro-2,5-dimethoxyphenyl)-N-(2-methoxybenzyl)ethanamine; some other names: 25C-NBOMe and 2C-C-NBOMe;
(k) 2-(4-Iodo-2,5-dimethoxyphenyl)ethanamine; some other names: 2C-I;
(l) 2-(4-Iodo-2,5-dimethoxyphenyl)-N-(2-methoxybenzyl)ethanamine; some other names: 25I-NBOMe and 2C-I-NBOMe;
(m) 2,5-dimethoxyamphetamine; some other names: 2,5-dimethoxy-alpha-methylphenethylamine and 2,5-DMA;
(n) 2-[4-(Ethylthio)-2,5-dimethoxyphenyl]ethanamine; some other names: 2C-T-2;
(o) 2-[4-(Isopropylthio)-2,5-dimethoxyphenyl]ethanamine; some other names: 2C-T-4;
(p) 3,4-Methylenedioxymethcathinone; some other names: Methylone;
(q) 3,4-methylenedioxy-N-ethylamphetamine; some other names: N-ethyl-alpha-methyl-3,4(methylenedioxy)-phenethylamine, N-ethyl MDA, MDE, and MDEA;
(r) 3,4-Methylenedioxypyrovalerone; some other names: MDPV;
(s) 4-bromo-2,5-dimethoxy-amphetamine: Some trade or other names: 4-bromo-2,5-dimethoxy-alpha-methylphenethylamine; some other names: 4-bromo-2,5-DMA;
(t) 4-methoxyamphetamine; some other names: 4-methoxy-alpha-methylphenethylamine; paramethoxyamphetamine, PMA;
(u) 4-methyl-2,5-diamethoxyamphetamine;
(v) 4-methyl-2,5-dimethoxy-amphetamine; some other names: 4-methyl-2,5-dimethoxy-alpha-methylphenethylamine; “DOM”; and “STP”;
(w) 4-Methylmethcathinone; some other names: Mephedrone;
(x) 5-methoxy-N,N-dimethyltryptamine; some other names: 5-methoxy-3-[2-(dimethylamino)ethyl]indole and 5-MeO-DMT;
(y) Alpha-ethyltryptamine; some other names: Etryptamine; monase; a-ethyl-1H-indole-3-ethanamine; 3-(2-aminobutyl) indole; a-ET; and AET;
(z) Beta-keto-N-Methylbenzodioxolylpropylamine; some other names: bk-MBDB and Butylone;
(aa) Ethylamine analog of phencyclidine; some other names: N-ethyl-1phenylcyclohexalymine, (1-phenylcyclohexyl) ethylamine; N-(1-phenylcyclohexyl)ethylamine; cyclohexamine; and PCE;
(bb) Ibogaine; some other names: 7-Ethyl-6,6 beta,7,8,9,10,12,13-octahydro-2-methoxy-6,9-methano-5H-pyrido [1',2':1,2] azepino [5,4-b] indole; and Tabernanthe iboga;
(cc) Marijuana Extract - Meaning an extract containing one or more cannabinoids that has been derived from any plant of the genus Cannabis, other than the separated resin (whether crude or purified) obtained from the plant;
(dd) N-hydroxy-3,4-methylenedioxyamphetamine; some other names: N-hydroxy-alpha-methyl-3,4(methylenedioxy)-phenethylamine; and N-hydroxy MDA;
(ee) Pyrrolidine analog of phencyclidine; some other names: 1-(1-phenylcyclohexyl)pyrrolidine; PCPy; and PHP;
(ff) Thiophene analog of phencyclidine; some other names: 1-[1-(2-thienyl)-cyclohexyl]-pipendine; 2-thienylanalog of phencyclidine; TPCP; TCP.