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3-MeO-PCP may be more likely to cause mania, delusions, and psychosis than other dissociatives.[1][2][3]

It is strongly discouraged to take this substance in high dosages, for multiple days in a row, or in combination with other substances that increase the risk of psychosis. Please see this section for more details.

Summary sheet: 3-MeO-PCP
Chemical Nomenclature
Common names 3-MeO-PCP, 3-MeO
Substitutive name 3-Methoxyphencyclidine
Systematic name 1-[1-(3-Methoxyphenyl)cyclohexyl]-piperidine
Class Membership
Psychoactive class Dissociative
Chemical class Arylcyclohexylamine
Routes of Administration

WARNING: Always start with lower doses due to differences between individual body weight, tolerance, metabolism, and personal sensitivity. See responsible use section.

Threshold 2 - 5 mg
Light 5 - 10 mg
Common 10 - 20 mg
Strong 20 - 25 mg
Heavy 25 mg + Heavy doses may result in psychosis and mania.[4]
Total 45 - 120 minutes
Threshold 2 - 4 mg
Light 4 - 8 mg
Common 8 - 15 mg
Strong 15 - 25 mg
Heavy 25 mg + Heavy doses may result in psychosis and mania.[4]
Total 4 - 8 hours
Onset 30 - 90 minutes
Come up 45 - 120 minutes
Peak 2 - 3 hours
Offset 1 - 2 hours
After effects 4 - 48 hours

Threshold 1 mg
Light 2 - 5 mg
Common 5 - 10 mg
Strong 10 - 15 mg
Heavy 15 mg + Heavy doses may result in psychosis and mania.[4]
Total 3 - 5 hours
Onset 5 - 30 minutes
Come up 45 - 90 minutes
Peak 1.5 - 2 hours
Offset 45 - 60 minutes
After effects 4 - 48 hours

DISCLAIMER: PW's dosage information is gathered from users and resources for educational purposes only. It is not a recommendation and should be verified with other sources for accuracy.

3-Methoxyphencyclidine (also known as 3-MeO-PCP) is a lesser-known novel dissociative substance of the arylcyclohexylamine class. 3-MeO-PCP is a derivative of phencyclidine (PCP) and is chemically related to substances like methoxetamine and 3-MeO-PCE. It produces its effects by blocking NMDA receptors in the brain.

3-MeO-PCP was first synthesized in 1979 in an investigation of phencyclidine (PCP) derivatives. However, its activity in humans was not described until 1999 when a chemist using the pseudonym John Q. Beagle reported qualitative similarities to PCP along with comparable potency.[5] In 2009, it began to be discussed on online forums such as bluelight.ru and was made available for sale on the research chemicals market.[6]

Like other arylcyclohexlyamines, 3-MeO-PCP induces a state referred to as "dissociative anesthesia", although the extent to which this occurs is reported to be highly dose-dependent and variable in its effects. It is commonly taken orally and nasally, although it may also be smoked and injected. It has been noted for its subtle come up and tendency to produce delusions of sobriety, which can lead to compulsive redosing.

Very little data exists for the pharmacology, metabolism, and toxicity of 3-MeO-PCP. Due to its potent hallucinogenic effects and lack of research, it is strongly advised to use use harm reduction practices if using this substance.


3-Methoxyphencyclidine, or 3-MeO-PCP, is a synthetic dissociative of the arylcyclohexylamine class. 3-MeO-PCP contains cyclohexane, a six-member saturated ring, bonded to two additional rings at R1. One of these rings is a piperidine ring, a nitrogenous six member ring, bonded at its nitrogen group. The other ring is an aromatic phenyl ring, substituted at R3 with a methoxy group.

3-MeO-PCP is a PCP derivative and structurally analogous to 4-MeO-PCP.


Further information: NMDA receptor antagonist

3-MeO-PCP acts as an NMDA receptor antagonist. A specific subtype of glutamate receptor, NMDA (N-Methyl-D-Aspartate), modulates the transmission of electrical signals between neurons in the brain and spinal cord; for the signals to pass, the receptor must be open.

Dissociatives inhibit the normal functioning NMDA receptors by binding to and blocking them. This disruption of neural network activity leads to loss of normal cognitive and affective processing, psychomotor functioning, anesthesia and eventually the equivalent of a "k-hole".

3-MeO-PCP has a Ki of 20 nM for the NMDA receptor, 216 nM for the serotonin transporter (SERT), 42 nM for the sigma-1 receptor and 2960 nM with H1 receptor [7] [8] It binds to the NMDA receptor with higher affinity than PCP and has the highest affinity of the three isomeric anisyl-substitutions, followed by 2-MeO-PCP and 4-MeO-PCP.[9]

Although 3-MeO-PCP was once claimed to possess opioid or dopaminergic activity,[10] this supposition is contradicted by data showing 3-MeO-PCP to be a potent and selective ligand for the NMDA receptor without appreciable affinity for the µ-opioid receptor or dopamine transporter.[11] 3-MeO-PCP was preceded by the less potent dissociative 4-MeO-PCP and first became available as a research chemical in 2011.[5]

Subjective effects

3-MeO-PCP is commonly described as being more stimulating and less immobilizing than other dissociatives such as ketamine or MXE. At lower doses, it can induce sensory enhancements such as color enhancement, acuity enhancement, tactile enhancement, auditory enhancement and bodily control enhancement. However, at medium to high doses, it presents sensory suppressions such as tactile suppression, motor control loss, auditory suppression and acuity suppression. Based on a large amount of experience reports, it appears to be considerably more likely to induce mania, delusions, and psychosis than other dissociatives (possibly due to its unusually high potency, compulsivity and erratic dose response).

The effects listed below are based upon the subjective effects index and personal experiences of PsychonautWiki contributors. These effects should be taken with a grain of salt and will rarely (if ever) occur all at once, but heavier doses will increase the chances of inducing a full range of effects. Likewise, adverse effects become much more likely on higher doses and may include serious injury or death.

Physical effects

Visual effects

Cognitive effects

Auditory effects

Disconnective effects

Experience reports

Anecdotal reports which describe the effects of this compound within our experience index include:

Additional experience reports can be found here:

Toxicity and harm potential

The toxicity and long-term health effects of recreational 3-MeO-PCP use has not been studied in any scientific context and the exact toxic dosage is unknown. This is because 3-MeO-PCP has very short history of human usage.

There is one death involving this substance recorded in the medical literature. In this case, the invidual's cause of death was determined to be from a combination of 3-MeO-PCP, amphetamine, and diphenhydramine.[12]

Dependence and abuse potential

3-MeO-PCP produces dependence with chronic use and has a high potential for abuse. In comparison to other dissociatives, 3-MeO-PCP has been reported to be more likely to produce psychological dependence than other dissociatives. When dependence has developed, cravings and withdrawal effects may occur if one suddenly stops their usage. There are multiple online reports of users becoming seriously dependent on this substance.

Tolerance to many of the effects of 3-MeO-PCP develops with prolonged and repeated use. This results in users having to administer increasingly large doses to achieve the same effects. After that, it takes about 3 - 7 days for the tolerance to be reduced to half and 1 - 2 weeks to be back at baseline (in the absence of further consumption). 3-MeO-PCP presents cross-tolerance with all dissociatives, meaning that after the consumption of 3-MeO-PCP, all dissociatives will have a reduced effect.


3-MeO-PCP has been reported to cause psychosis, delusions, and mania at a significantly higher rate than other dissociatives such as ketamine, diphenidine, or MXE. There are a large number of experience reports online which describe states of "psychotic delirium, amnesia, mania, and other serious consequences" after abusing 3-MeO-PCP.[13][14][15] In some cases, it has resulted in hospitalization and occasionally has taken up to a week or more to resolve.[16][17][18][19][20]

  • Users should avoid taking 3-MeO-PCP for multiple days in a row or becoming dependent on it as this seems to be the main risk factor in the observed incidences of severe adverse effects.
  • The recommended dosage range should not be exceeded as high doses can trigger these effects as well.
  • Users should start with extremely low doses and work their way up as slowly as possible. Volumetric liquid dosing should preferably be used due to the drug's potency; most standard milligram scales cannot accurately weigh out doses below 10-15mg.
  • Compulsive redosing before one has fully sobered up is not recommended and can result in too high of a dose.

Due to the risk of psychosis, it is not recommended to combine this substance with other substances, especially stimulants, psychedelics, or other dissociatives like MXE. Independent research should always be done to ensure that a combination of two or more substances is safe before consumption.

It is strongly advised to use harm reduction practices when using this substance.

Urinary tract effects

In terms of its long-term health effects when used repeatedly and excessively for extended periods of time, 3-MeO-PCP seems to exhibit almost identical bladder and urinary tract problems to those found within ketamine, but to a lesser extent. This is possibly because 3-MeO-PCP is far more potent than ketamine so significantly less of drug needs to be consumed. Symptoms of ketamine-induced cystitis can become extremely serious and can be described as:

  • Urinary frequency - Urinary frequency is the need to empty the bladder every few minutes.
  • Urinary urgency - This can be described as a sudden, compelling need to urinate.
  • Urinary pressure - This is experienced as a constant sensation of fullness in the bladder that is unrelieved by urination.
  • Pelvic and bladder pain - Pain can develop suddenly and severely, particularly as the bladder fills with urine.
  • Hematuria - Hematuria is visible blood in the urine.
  • Incontinence - This is the leakage of urine.

These effects can be mitigated by refraining from using 3-MeO-PCP regularly (on a daily or weekly basis) and manually limiting one's usage of the substance.

Dangerous interactions

Although many psychoactive substances are safe to use on their own, they can quickly become dangerous or even life-threatening when combined with other substances. The following lists some known dangerous combinations, but may not include all of them. A combination that appears to be safe in low doses can still increase the risk of injury or death. Independent research should always be conducted to ensure that a combination of two or more substances is safe to consume. Some interactions listed have been sourced from Tripsit.

  • Stimulants - Both stimulants and dissociatives carry the risk of adverse psychological reactions like anxiety, mania, delusions and psychosis and these risks are exacerbated when the two substances are combined.
  • Depressants - Because both depress the respiratory system, this combination can result in an increased risk of suddenly falling unconscious, vomiting and choking to death from the resulting suffocation. If nausea or vomiting occurs, users should attempt to fall asleep in the recovery position or have a friend move them into it.

Legal status

  • Austria: 3-MeO-PCP is illegal to possess, produce and sell under the NPSG (Neue-Psychoaktive-Substanzen-Gesetz Österreich).[citation needed]
  • Brazil: As of May 17, 2018, 25C-NBOH has been added to Portaria SVS/MS nº 344. Possession, distribution and use of this substance is now considered illegal.[21]
  • Germany: On November 21, 2015, 3-MeO-PCP was added to "Anlage II" of the controlled substance act ("BtMG"), making it illegal to produce, sell or possess.[22]
  • Sweden: Sweden's public health agency suggested classifying 3-MeO-PCP as a hazardous substance on November 10, 2014.[23]
  • United Kingdom: 3-MeO-PCP is a class B drug in the UK and is illegal to possess, produce, supply, or import. As a derivative of 1-Phenylcyclohexylamine where the amine has been replaced with a 1-piperidyl group, further substituted in the phenyl ring with an alkoxy substituent, it is covered by the arylcyclohexylamine generic clause added to the Misuse of Drugs Act by S.I. 2013/239, which came into effect on the 26th February 2013.[24]
  • United States: 3-MeO-PCP is not a controlled substance in the United States but possession or distribution of 3-MeO-PCP for human use could potentially be prosecuted under the Federal Analogue Act due to its structural and pharmacological similarities to PCP.

See also

External links

Discussion and Media


  • Morris, H., & Wallach, J. (2014). From PCP to MXE: A comprehensive review of the non-medical use of dissociative drugs. Drug Testing and Analysis, 6(7–8), 614–632. https://doi.org/10.1002/dta.1620


  1. The Big & Dandy 3-MeO-PCP Thread - Part 2 (Bluelight) | http://www.bluelight.org/vb/threads/697059-The-Big-amp-Dandy-3-MeO-PCP-Thread-Part-2
  2. The Big & Dandy 3-MeO-PCP Thread - Mad Manic Meo 3nity | http://www.bluelight.org/vb/threads/760934-The-Big-amp-Dandy-3-MeO-PCP-Thread-Mad-Manic-Meo-3nity
  3. The Big & Dandy 3-MeO-PCP Thread - Part 1 (Bluelight) | http://www.bluelight.org/vb/threads/454099-The-Big-amp-Dandy-3-MeO-PCP-Thread-%28Part-1%29
  4. 4.0 4.1 4.2 3-MeO-PCP Psychosis (PsychonautWiki) | https://psychonautwiki.org/wiki/3-MeO-PCP#Toxicity_and_harm_potential
  5. 5.0 5.1 Morris, H., & Wallach, J. (2014). From PCP to MXE: A comprehensive review of the non-medical use of dissociative drugs. Drug Testing and Analysis, 6(7–8), 614–632. https://doi.org/10.1002/dta.1620
  6. Morris, H., & Wallach, J. (2014). From PCP to MXE: A comprehensive review of the non-medical use of dissociative drugs. Drug Testing and Analysis, 6(7–8), 614–632. https://doi.org/10.1002/dta.1620
  7. http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0194984
  8. Advisory Council on the Misuse of Drugs (ACMD) Methoxetamine report, 2012 | https://www.gov.uk/government/publications/advisory-council-on-the-misuse-of-drugs-acmd-methoxetamine-report-2012
  9. http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0194984
  10. Interview with a ketamine chemist: or to be more precise, an arylcyclohexylamine chemist | http://www.vice.com/read/interview-with-ketamine-chemist-704-v18n2
  11. The Ketamine Analogue Methoxetamine and 3- and 4-Methoxy Analogues of Phencyclidine Are High Affinity and Selective Ligands for the Glutamate NMDA Receptor | http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0059334
  12. Bakota, E., Arndt, C., Romoser, A. A., & Wilson, S. K. (2016). Fatal Intoxication Involving 3-MeO-PCP: A Case Report and Validated Method. Journal of Analytical Toxicology, 40(7), 504–510. http://doi.org/10.1093/jat/bkw056
  13. The Big & Dandy 3-MeO-PCP Thread - Part 2 (Bluelight) | http://www.bluelight.org/vb/threads/697059-The-Big-amp-Dandy-3-MeO-PCP-Thread-Part-2
  14. The Big & Dandy 3-MeO-PCP Thread - Mad Manic Meo 3nity | http://www.bluelight.org/vb/threads/760934-The-Big-amp-Dandy-3-MeO-PCP-Thread-Mad-Manic-Meo-3nity
  15. The Big & Dandy 3-MeO-PCP Thread - Part 1 (Bluelight) | http://www.bluelight.org/vb/threads/454099-The-Big-amp-Dandy-3-MeO-PCP-Thread-%28Part-1%29
  16. Phencyclidine analog use in Sweden--intoxication cases involving 3-MeO-PCP and 4-MeO-PCP from the STRIDA project. (PubMed.gov / NCBI) | http://www.ncbi.nlm.nih.gov/pubmed/26295489
  17. The Big & Dandy 3-MeO-PCP Thread - Part 2 | Page 18 | 10-08-2014 09:10 | Post #448 by Sekio (Administrator) | http://www.bluelight.org/vb/threads/697059-The-Big-amp-Dandy-3-MeO-PCP-Thread-Part-2?p=12523821&viewfull=1#post12523821
  18. The Big & Dandy 3-MeO-PCP Thread - Part 2 | Page 20 | 30-08-2014 14:08 | Post #481 by Chocodoobie | http://www.bluelight.org/vb/threads/697059-The-Big-amp-Dandy-3-MeO-PCP-Thread-Part-2?p=12559322&viewfull=1#post12559322
  19. The Big & Dandy 3-MeO-PCP Thread - Part 3 | Page 1 | 23-06-2015 11:53 | Post #5 by Confield | http://www.bluelight.org/vb/threads/760934-The-Big-amp-Dandy-3-MeO-PCP-Thread-Mad-Manic-Meo-3nity?p=13108675&viewfull=1#post13108675
  20. https://www.erowid.org/experiences/exp.php?ID=103972 | NumbnDumb. "So Strong I'm Shocked: An Experience with 3-MeO-PCP (ID 103972)". Erowid.org. Jan 24, 2016. erowid.org/exp/103972
  21. List of controlled substances: Portaria SVS/MS nº 344 (Portuguese) | http://portal.anvisa.gov.br/lista-de-substancias-sujeitas-a-controle-especial
  22. 30. BtMÄndVO in Kraft getreten | http://blog.beck.de/2015/11/23/30-btm-ndvo-in-kraft-getreten-6-neue-stoffe-wurden-ins-btmg-aufgenommen-0
  23. Cannabinoider föreslås bli klassade som hälsofarlig vara | http://www.folkhalsomyndigheten.se/nyheter-och-press/nyhetsarkiv/2014/november/cannabinoider-foreslas-bli-klassade-som-halsofarlig-vara/
  24. The Misuse of Drugs Act 1971 (Amendment) Order 2013 (Legislation.gov.uk) | http://www.legislation.gov.uk/uksi/2013/239/introduction/made