3-Cl-PCP
3-chlorophencyclidine
Viewing r1 — May 7, 2026 — CURRENT
Back to HistoryInteractions, related substances, and reports reflect the current entry and are not shown for historical revisions.
3-Cl-PCP (3-chlorophencyclidine) is a synthetic dissociative of the arylcyclohexylamine class. It is a direct structural analog of PCP, differing by a single chlorine atom on the phenyl ring. It blocks glutamate signaling in the brain,[1] disrupting communication across memory, sensory, and motor circuits and producing a dissociative state.
Psychedex is in open beta. We are still fine-tuning the generation and review process. Please double-check sources.
No dose data on record for this route. The timings below are not a dose guide.
ketamine, dextromethorphan, methoxetamine +4 moreketamine, dextromethorphan, methoxetamine, 3-MeO-PCP, PCP, other NMDA antagonists, sigma agonists (SKF-10047) show less
3-Cl-PCP appeared around 2020, manufactured by Chinese chemical suppliers and sold on the research chemical market alongside other ring-substituted PCP analogs.[2] It was first formally identified in December 2020 by the Slovenian National Forensic Laboratory. It has no therapeutic history and remains unscheduled in most countries, though regulatory attention to PCP analogs is intensifying.
Subjective effects include dissociation, depersonalization, motor impairment, perceptual distortion, and stimulant-like activation. The experience is expected to resemble PCP more closely than ketamine — longer-lasting,[3] more activating, and with greater potential to produce psychosis-like states.[4] Agitation, confusion, and thought disorganization are characteristic unsought effects.
Both physical and psychological dependence are rated moderate,[5] and no toxic dose has been established in any species. The dominant risk is psychiatric: PCP-class compounds are among the most powerful psychotomimetics, and 3-Cl-PCP produced psychosis-like cognitive deficits in a rodent model.[4] Almost nothing is known about this substance specifically — a single animal study constitutes the entire published record.
History[edit]
Synthesis and emergence
3-Cl-PCP appeared around 2020, manufactured by Chinese chemical suppliers and marketed alongside other ring-substituted PCP analogs.[6][7] It was first formally identified in December 2020 by the Slovenian National Forensic Laboratory, confirmed through mass spectrometry and nuclear magnetic resonance spectroscopy as part of the EU Early Warning System on drugs.[2][6]
Historical context
PCP was developed in the 1950s as a surgical anesthetic and withdrawn in the 1960s after patients experienced agitation, hallucinations, and delirium on recovery. Structure-activity research on ring-substituted analogs continued through the 1980s,[8] and methoxy-substituted analogs 3-MeO-PCP and 4-MeO-PCP reached the research chemical market around 2011.[9] 3-Cl-PCP is the first chlorine-at-meta-position PCP analog to gain meaningful distribution as a novel psychoactive substance.
Regulatory timeline
Hungary explicitly banned 3-Cl-PCP in April 2021.[6] In March 2026, the U.S. DEA permanently placed 3-MeO-PCP in Schedule I,[10] establishing regulatory precedent for the PCP analog class. 3-Cl-PCP has no clinical history and has never been tested therapeutically.
Chemistry[edit]
Structural class
3-Cl-PCP belongs to the arylcyclohexylamine chemical class — the same family as PCP, ketamine, 3-MeO-PCP, and methoxetamine. The defining structural change from PCP is a chlorine atom at the 3-position (meta) of the phenyl ring. Its molecular formula is C₁₇H₂₄ClN, with a molecular weight of 277.8 g/mol — slightly heavier than PCP (243.4 g/mol) due to the chlorine substituent.
Stereochemistry
The molecule has a chirality center at the cyclohexyl-phenyl junction, though no data exist on which mirror-image form is more pharmacologically active — the compound is typically characterized as the racemic mixture. No published physical characterization of the free base or salt forms exists; by analogy with PCP, the hydrochloride salt is expected to be a white to off-white crystalline solid.
Pharmacology[edit]
Mechanism of action
3-Cl-PCP is presumed to block NMDA receptors — the brain's primary excitatory signaling pathway.[1] It enters the receptor channel only when it is open, so its effect scales with ongoing brain activity.[3] This blockade simultaneously disrupts communication across memory, sensory, and motor circuits.
Behavioral pharmacology
The only published animal study found that 3-Cl-PCP produced locomotor stimulation exceeding that of PCP, methamphetamine, and MDMA.[4] It fully substituted for PCP in drug discrimination tests, confirming a PCP-like internal experience. It also impaired rule-governed cognition in a task where cocaine and morphine had no effect — pointing to a specific effect of NMDA blockade on prefrontal function.
Pharmacokinetics
No human pharmacokinetic data exist for 3-Cl-PCP. By analogy with PCP, the drug distributes heavily into brain tissue, reaching concentrations up to 9 times those in blood,[3] with a half-life averaging 17.6 hours but sometimes exceeding 2 days.[11] About 90% clears through liver metabolism,[12][13] and PCP accumulates in the stomach at concentrations far exceeding blood levels[3] — a pattern that may drive unpredictable effects with repeated dosing.
Neuroscience[edit]
Where it acts
PCP-class dissociatives block NMDA receptors on inhibitory neurons — the cells that normally keep cortical activity regulated.[1] Removing that brake paradoxically increases chaotic cortical firing. The downstream effects include impaired sensory filtering, disrupted memory coordination between prefrontal cortex and hippocampus, and dopamine release from the brain's reward circuitry.[1]
Why it matters
PCP-induced psychosis has served as the primary pharmacological model of schizophrenia for decades.[1] Unlike amphetamine psychosis, NMDA blockade reproduces not just hallucinations and delusions but also social withdrawal, emotional flattening, and cognitive disorganization. Under the predictive processing framework, NMDA receptors help the brain filter meaningful signals from noise — blocking them generates aberrant perceptions and fragmented experience.[14]
Whether 3-Cl-PCP promotes neuroplasticity — as ketamine does in rapid antidepressant effects — is entirely unknown. If it inactivates its own metabolizing enzyme as PCP does, repeated dosing could produce dangerous drug accumulation. No human dose-response data exist.
Subjective Effects[edit]
3-Cl-PCP produces a dissociative state with a pronounced stimulant edge. Rather than the sedating, brief disconnection characteristic of ketamine, the experience is activating — thought and perception fragment and become unmoored while the body remains alert. Psychotomimetic potential is high; this compound can produce states that closely resemble psychosis.
The closest experiential reference point is 3-MeO-PCP — similarly activating, similarly long-lasting. It aligns behaviorally with PCP rather than ketamine; rodent drug discrimination confirms it produces PCP-equivalent internal cues.[4] Set and setting are expected to shape the psychological trajectory strongly.
Effect Grid
A clear dissociative state is established — pronounced cognitive disconnection, depersonalization, and derealization define the psychological landscape. Internal hallucinations may emerge, and perspective distortion alters the apparent geometry of spaces. Visual processing suppression and visual drifting become evident. Vestibular distortion produces a floating or tilting sensation.
Stimulation remains prominent: the body feels energized despite significant motor control impairment. Walking becomes visibly uncoordinated. Pain suppression is strong. Tachycardia and mild hypertension are expected. Spontaneous body sensations, tactile euphoria, and bodily lightness contribute to a complex somatic profile. Excessive sweating and dehydration sensation may occur.
Amnesia for portions of the experience is likely. Thought disorganization and thought deceleration impair coherent reasoning. Immersion enhancement may produce absorbing internal experiences. Compulsive redosing urge may emerge — this should be anticipated and guarded against. The experience commits the user to a prolonged timeline.
Modeled from the effect's dose-dependence curve — not per-substance measurements.
Depth perception distortion · Proprioceptive distortion · Ganzfeld effect · Sensory deprivation · Visual drifting · Visual haze / noise · Touch enhancement · Music enhancement · Auditory distortion · Auditory misinterpretation · Color alteration · Peripheral vision distortion · After-images · Auditory suppression · Dreaming suppression · Peripheral misidentification · Tinnitus · Tracers · Visual morphing · Visual processing suppression · Internal hallucinations · Visual scenery slicing · Auditory hallucinations · External hallucinations · Perspective hallucinations · Shadow people · Olfactory hallucination · Persisting hallucinations
Visual drifting · Visual haze / noise · Touch enhancement · Music enhancement · Auditory distortion · Auditory misinterpretation · Color alteration · Peripheral vision distortion · After-images · Auditory suppression · Dreaming suppression · Peripheral misidentification · Tinnitus · Tracers · Visual morphing · Visual processing suppression · Internal hallucinations · Visual scenery slicing · Auditory hallucinations · External hallucinations · Perspective hallucinations · Shadow people · Olfactory hallucination · Persisting hallucinations
Body high · Body schema distortion · Nystagmus (eye wobbles) · Pupil dilation · Restlessness · Spontaneous body sensations · Bodily lightness · Tactile euphoria · Appetite suppression · Dry mouth · Sedation · Wakefulness · Dehydration sensation · Sexual arousal suppression · Excessive sweating · Bodily heaviness · Heart rate perception changes · Insomnia · Laughter fits · Muscle tension · Physical fatigue · Vasoconstriction · Breathing alteration · Bruxism · Headache · Involuntary body movements · Muscle relaxation · Nausea · Tingling / electric sensations · Vibrations / buzzing · Abnormal heartbeat · Respiratory depression · Increased urination · Sexual arousal enhancement · Trembling · Vomiting · Bodily dissociation · Seizure threshold reduction · Tactile hallucination · Phantom limb sensations
Pupil dilation · Restlessness · Spontaneous body sensations · Bodily lightness · Tactile euphoria · Appetite suppression · Dry mouth · Sedation · Wakefulness · Dehydration sensation · Sexual arousal suppression · Excessive sweating · Bodily heaviness · Heart rate perception changes · Insomnia · Laughter fits · Muscle tension · Physical fatigue · Breathing alteration · Bruxism · Headache · Involuntary body movements · Muscle relaxation · Nausea · Tingling / electric sensations · Vibrations / buzzing · Abnormal heartbeat · Respiratory depression · Increased urination · Sexual arousal enhancement · Trembling · Vomiting · Bodily dissociation · Seizure threshold reduction · Tactile hallucination · Phantom limb sensations
Cognitive euphoria · Confusion · Focus suppression · Information processing suppression · Memory fragmentation · Immersion enhancement · Thought deceleration · Pattern recognition suppression · Analysis suppression · Thought connectivity · Aesthetic enhancement · Cognitive fatigue · Delusions of sobriety · Introspection enhancement · Motivation suppression · Novelty enhancement · Openness enhancement · Suggestibility enhancement · Thought acceleration · Thought loops · Creativity enhancement · Humor enhancement · Conceptual thinking · Cognitive dysphoria · Language suppression · Multiple thought streams · Motivation enhancement · Amnesia · Delusions · Delirium
Information processing suppression · Memory fragmentation · Immersion enhancement · Thought deceleration · Pattern recognition suppression · Analysis suppression · Thought connectivity · Aesthetic enhancement · Cognitive fatigue · Introspection enhancement · Motivation suppression · Novelty enhancement · Openness enhancement · Suggestibility enhancement · Thought acceleration · Thought loops · Creativity enhancement · Humor enhancement · Conceptual thinking · Cognitive dysphoria · Language suppression · Multiple thought streams · Motivation enhancement · Amnesia · Delusions · Delirium
Emotional enhancement · Emotional lability · Empathy suppression · Anhedonia · Anxiety · Dysphoria · Irritability · Mania
Anhedonia · Anxiety · Dysphoria · Irritability
Sociability suppression · Social disconnection · Communication suppression · Craving · Ego inflation · Sociability enhancement · Cognitive disconnection · Identity alteration · Boundary dissolution · Ego dissolution
Ego inflation · Sociability enhancement · Cognitive disconnection · Identity alteration · Boundary dissolution · Ego dissolution
Transpersonal visions · Death-rebirth sequence · Near-death experience
Timeline
Gradual emergence of first perceptible effects — subtle lightheadedness, faint bodily warmth, and a nascent sense of detachment. Effects build slowly due to the high lipophilicity and extensive tissue distribution characteristic of PCP-class arylcyclohexylamines.
Dissociation and stimulation build steadily. Motor coordination begins to decline, spatial orientation loosens, and a noticeable mood lift or cognitive euphoria emerges. Heart rate increases.
Maximum dissociation, perceptual distortion, and cognitive disruption. Internal hallucinations, depersonalization, and profound motor impairment define this phase. Stimulation remains prominent.
Sustained dissociative plateau at reduced but still significant intensity. Cognitive fog, amnesia, and motor impairment persist. The stimulant component may sustain wakefulness and restlessness.
Gradual return toward baseline. Residual stimulation, cognitive fog, and mild perceptual distortion linger. Motor coordination improves slowly.
Prolonged residual effects — cognitive impairment, physical fatigue, mood instability, and subtle perceptual shifts may persist for hours to days. Sleep architecture disruption is common.
⚠ Do not drive or operate machinery for at least 24 hours after use; PCP-class compounds produce prolonged cognitive and motor impairment that may outlast subjective effects.
Safety[edit]
- Acute toxicity
- Moderate
- Chronic toxicity
- Moderate
- Withdrawal
- Moderate
- Tolerance buildup
- rapid
- Tolerance reset
- 10.5 days
- Physical
- Moderate
- Psychological
- Moderate
- Compulsive redosing
- Moderate
- Dose escalation
- Moderate
- Cross-tol.
- ketamine · dextromethorphan · methoxetamine
Toxicity
No controlled toxicity data exist for 3-Cl-PCP. The toxic dose is unknown in all species.
Acute toxicity
In the only published animal study, 3-Cl-PCP did not cause death at the doses tested — distinguishing it from 3-OH-PCP and 3-MeO-PCP, both of which produced fatalities.[4] This does not establish safety; it reflects only the limited dose range examined.
Computer modeling for related PCP analogs estimates lethal doses in rats at approximately 200–630 mg/kg orally and 25–59 mg/kg intravenously in mice.[15] These predictions carry significant uncertainty and have not been validated for 3-Cl-PCP.safety citation needed
Heart and circulation
PCP-class compounds raise heart rate and blood pressure by stimulating the sympathetic nervous system.[3] Computer modeling also predicts potential for heart rhythm disruption via hERG channel inhibition.[15]safety citation needed
Muscle breakdown and kidney injury
Muscle breakdown and acute kidney injury are documented for 3-methyl-PCP, a closely related analog.[16] PCP-class compounds produce sustained involuntary muscle contraction, agitation, and overheating — all established contributors to this risk. 3-Cl-PCP carries the same risk by class membership.
Liver toxicity
Computer modeling predicts the liver as a target organ for PCP analogs.[15] PCP is converted to reactive intermediates in the liver[12] that could generate toxic metabolites. No clinical liver toxicity data exist for 3-Cl-PCP.safety citation needed
Brain toxicity
Chronic NMDA blocker exposure causes damage to specific brain regions in rodent models. Long-term cognitive impairment and white matter abnormalities are documented in chronic ketamine users, establishing precedent for cumulative brain damage within this class.citation needed
Psychological risks
Psychosis is the principal psychological risk. PCP is among the most potent drug-induced psychosis triggers, producing hallucinations, delusions, social withdrawal, emotional flattening, and thought disorganization.[1] 3-Cl-PCP produced dose-dependent psychosis-like cognitive deficits in a rat model designed for validity against the human psychosis construct.[4]
Prolonged psychiatric effects are documented for the closely related 3-MeO-PCP, with hallucinations persisting up to six weeks after a single exposure.[17] Agitation and violent behavior are characteristic of PCP-class intoxication, driven by dissociation, dopamine-driven disinhibition, and pain insensitivity.[3] No published human case reports of 3-Cl-PCP intoxication exist.[2]
Tolerance & dependence
Tolerance to PCP-class compounds develops rapidly. In rats, continuous PCP infusion produced tolerance within 3.5 days;[5] in monkeys, roughly 2-fold tolerance developed after 82–126 days of chronic dosing.[18] Cross-tolerance is documented with sigma agonists[19] and is expected across the dissociative class, including ketamine, dextromethorphan, and other NMDA antagonists.
Physical dependence has been demonstrated for PCP in rats after 7 days of continuous infusion, with withdrawal including seizures, weight loss, and reduced activity emerging approximately 4 hours after cessation.[5] PCP reliably drives self-administration in animal models, confirming genuine addictive potential.[8] Both physical and psychological dependence are rated moderate for 3-Cl-PCP based on class data.
Drug interactions
No published interaction data exist for 3-Cl-PCP. All interactions are extrapolated from PCP and arylcyclohexylamine class pharmacology.
CNS depressants (alcohol, benzodiazepines, opioids, GHB) add to sedation and respiratory depression. Polydrug use was identified in 53% of ketamine-related deaths in a systematic review[20] — the highest-risk interaction category for the class.
Stimulants (amphetamines, cocaine, MDMA) compound dopamine activation, raising the risk of dangerously elevated blood pressure, overheating, and acute psychosis.
Lithium combined with dissociatives increases seizure risk.[21]
MAOIs combined with PCP-class compounds risk serotonin syndrome via the monoamine reuptake inhibitor component of PCP pharmacology.
Serotonergic agents (tramadol, SSRIs, SNRIs) combined with NMDA antagonists that also inhibit serotonin reuptake may increase serotonin syndrome risk, though direct evidence for 3-Cl-PCP is absent.
Contraindications
Pre-existing psychotic disorders: NMDA antagonists worsen schizophrenia spectrum symptoms. 3-Cl-PCP is contraindicated for individuals with schizophrenia, schizoaffective disorder, or a personal or family history of psychosis.[1]
Heart conditions: Sympathomimetic effects and predicted heart rhythm disruption carry serious risk for those with cardiac disease or high blood pressure.[15]
Concurrent CNS depressant use: Combining with opioids, benzodiazepines, alcohol, or GHB carries life-threatening breathing suppression risk. Polydrug involvement accounts for the majority of dissociative-related deaths.[20]
Concurrent stimulant use: Combined dopamine activation may produce unpredictable cardiovascular stress and psychiatric destabilization.
Pregnancy and lactation: No reproductive data exist. Contraindicated by class analogy.safety citation needed
Liver impairment: PCP-class compounds undergo near-complete liver metabolism (~90%); significant liver dysfunction could produce dangerous drug accumulation.inferred
Kidney impairment: Muscle breakdown risk and potential for acute kidney injury warrant caution in those with pre-existing kidney disease.inferred
Harm Reduction[edit]
Forms & Identification
3-Cl-PCP circulates exclusively through the research chemical market. Product identity and purity are unverified by default. A single chlorine atom is the only structural difference from PCP — the compound cannot be distinguished from other PCP analogs by appearance, taste, or smell.
Independent laboratory analysis (energy-dispersive X-ray spectroscopy or mass spectrometry via services like DrugsData or WEDINOS) is the only way to confirm identity. Standard reagent kits provide limited discrimination within the arylcyclohexylamine class. A negative fentanyl test strip excludes fentanyl contamination only — it does not confirm identity or safety.
Guidelines
- Test every batch. Use reagent testing and, where possible, laboratory analysis to confirm substance identity. Do not assume consistency between batches.
- Start extremely low. No human dose range has been established for 3-Cl-PCP. Begin with the smallest amount that can be accurately measured and wait the full expected onset window before considering any additional dose.
- Do not redose. PCP-class compounds have long durations and may accumulate non-linearly with repeated dosing. Redosing before effects fully resolve risks dangerous accumulation.
- Use volumetric dosing. Powder quantities at the milligram scale cannot be accurately divided by eye. Dissolve a known amount in a measured volume of solvent and dose by volume.
- Avoid all combinations. CNS depressants, stimulants, lithium, MAOIs, and serotonergic medications all carry dangerous interaction potential with PCP-class compounds.
- Ensure a sober sitter is present. Dissociative crises can escalate unpredictably. The sitter should know what substance was taken and when.
- Secure the environment. Remove sharp objects, lock windows and doors to balconies, and restrict access to vehicles. Pain insensitivity during intoxication removes normal self-protective behavior.
Set & Setting
PCP-class dissociatives carry pronounced psychotomimetic potential. The risk of agitation, paranoia, and psychotic reactions rises sharply in unfamiliar, chaotic, or high-stimulation environments. A calm, controlled, private setting with minimal external demands is strongly advised.
A sober, trusted companion who understands dissociative crisis presentation is essential. PCP-class intoxication can produce pain insensitivity and loss of behavioral restraint — the affected person may not recognize danger or respond to verbal de-escalation. Prior dissociative experience and a stable psychological baseline reduce but do not eliminate psychiatric risk.
Aftercare & integration. Dissociative experiences — particularly with PCP-class compounds — can leave lasting cognitive and emotional residue. Feelings of unreality, detachment, or confusion may persist for hours to days after the primary effects have resolved. Full cognitive recovery should precede any responsibilities requiring focused attention, driving, or decision-making.
Dissociative symptoms — feeling detached from the body or surroundings, difficulty distinguishing reality from memory — persisting beyond 48 hours warrant medical attention. Prolonged psychiatric effects lasting weeks are documented with related compounds. Journaling the experience and discussing it with a trusted person can help reground and process unusual perceptual states.
Recovery & Support
PCP-class dissociatives carry moderate abuse liability. Patterns of escalating use, compulsive redosing despite negative consequences, or using to manage emotional distress indicate problematic use. Cross-tolerance across dissociatives means switching compounds does not reset dependence risk.
Professional support options include addiction counselors experienced with dissociative or novel psychoactive substance use, psychiatrists who can address co-occurring conditions, and peer support communities. SAMHSA's National Helpline (1-800-662-4357) provides free, confidential referrals. In crisis, contact the 988 Suicide and Crisis Lifeline by calling or texting 988.
Recovery resources, crisis lines, and support pathways → View all
Emergency Response
Recognizing an emergency:
- Severe agitation or combative behavior that cannot be verbally de-escalated
- Seizures or sustained involuntary muscle rigidity
- Chest pain, irregular heartbeat, or difficulty breathing
- Loss of consciousness or unresponsiveness
- Self-harm behavior or complete disconnection from reality
- Body temperature that feels dangerously hot to the touch
Immediate steps:
- 1. Call emergency services immediately if any of the above signs are present.
- 2. Do not physically restrain the person unless there is immediate risk of self-harm or harm to others — restraint can worsen agitation and increase muscle breakdown risk.
- 3. Move the person to a quiet, low-stimulation environment if safely possible.
- 4. Place an unconscious person in the recovery position (on their side, airway clear).
- 5. Do not induce vomiting.
- 6. Monitor breathing and body temperature continuously until help arrives.
What to tell the dispatcher: Name the substance (3-Cl-PCP, a PCP analog), the amount if known, the time of ingestion, and current symptoms. Good Samaritan laws in many jurisdictions protect people who call for help during a drug emergency.
No reversal agent exists for PCP-class dissociatives. Treatment is supportive.
Legal Status[edit]
3-Cl-PCP is not named in any international drug control convention and is not specifically scheduled in most national jurisdictions. Its structural similarity to PCP subjects it to structural analog legislation in several countries.[22] Regulatory attention to the PCP analog class is growing — 3-MeO-PCP was permanently scheduled in the United States in March 2026.[10]
| Jurisdiction | Classification | Key provisions |
|---|---|---|
| United States | Not specifically scheduled; subject to Federal Analogue Act | As a structural analog of PCP (Schedule II), 3-Cl-PCP is treated as Schedule I when intended for human consumption under 21 U.S.C. § 813inferred |
| United Kingdom | Covered by Psychoactive Substances Act 2016 | Supply, production, and importation are criminal offenses; not separately listed under the Misuse of Drugs Act 1971citation needed |
| Hungary | Illegal | Explicitly banned since April 2021[6] |
| International (UN) | Not scheduled | Not named in the 1971 Convention on Psychotropic Substances; PCP and named analogs are Schedule I[22] |
Legal status changes frequently and varies by jurisdiction. This information is not legal advice. Verify current status in the relevant jurisdiction before taking any action.
references
- [1]
- [2]
- [3]
- [4] ^abcdefShaw HE, Patel DR, Gannon BM, Fitzgerald LR, Carbonaro TM, Johnson CR, Fantegrossi WE (2024) Phencyclidine-Like Abuse Liability and Psychosis-Like Neurocognitive Effects of Novel Arylcyclohexylamine Drugs of Abuse in Rodents — The Journal of Pharmacology and Experimental Therapeutics doi:10.1124/jpet.123.001942
- [5] ^abcSpain JW, Klingman GI (1985) Continuous intravenous infusion of phencyclidine in unrestrained rats results in the rapid induction of tolerance and physical dependence — Journal of Pharmacology and Experimental Therapeutics PMID:4040569
- [6]