How long does 3-MeO-PCMo last?

The total duration of 3-MeO-PCMo via oral is 5 hours to 6 hours. Onset typically occurs within 1 hour to 2 hours. Peak effects last 2 hours to 3 hours.

3-MeO-PCMo — SubstanceWiki

3-MeO-PCMo (3-methoxyphencyclomorpholine) is a synthetic dissociative of the arylcyclohexylamine class, a morpholine-ring analog of 3-MeO-PCP and structural cousin to PCMo. The methoxymorpholine substitution distinguishes it from both straight-chain aminoalkyl analogs (like PCP) and ketamine-type structures. Community experience with 3-MeO-PCMo is relatively limited compared to the broader catalog of novel dissociatives, placing it among the less well-characterized compounds in this class.

Based on structural similarity to 3-MeO-PCP, 3-MeO-PCMo is expected to act as an NMDA receptor antagonist with likely sigma receptor and dopaminergic activity. The pharmacological character is anticipated to resemble 3-MeO-PCP in its stimulant-dissociative profile while potentially differing in potency and duration due to the morpholine ring's metabolic and pharmacokinetic effects.

The limited community experience data and absence of formal pharmacological research place 3-MeO-PCMo in the high-uncertainty category. Users should approach it with the caution appropriate to any poorly characterized novel psychoactive substance: start with very low doses, use in a controlled environment with a sober companion, and recognize that harm reduction guidance is necessarily extrapolated from better-understood analogs.

How It Feels

The onset is gentle and almost tentative, as though the compound is politely introducing itself before committing to anything. A mild heaviness settles over the body within fifteen or twenty minutes — nothing dramatic, just a softening of physical tension, a subtle unclenching of muscles you did not realize were tight. The world takes on a faintly muted quality, as though someone has placed a single sheet of tissue paper between you and your surroundings. It is a whisper of dissociation, not a shout.

As the effects develop over the next half hour, the experience remains firmly in the shallow end of the dissociative pool. Sound acquires a very slight echo, as if the room has grown marginally larger. Vision is mostly unaffected, though there may be a faint softness to light sources, a barely perceptible glow around lamps and screens. The body feels comfortable and slightly heavy — not leaden, but pleasantly anchored, as though gravity has been gently increased by a fraction. Thoughts slow a notch, shedding some of their usual urgency, and there is a quiet contentment to simply sitting and observing.

The peak, such as it is, arrives within an hour and presents itself as a mild plateau of calm detachment. You can think clearly, move normally, and hold conversation without difficulty. What has changed is the emotional weather: anxiety has receded, replaced by a neutral, observational state that is neither euphoric nor flat. It is the experience of watching rain from behind a window — you can see it, understand it, but you are not getting wet. Closed-eye visuals are minimal or absent. Music sounds slightly richer, slightly more textured, but the enhancement is subtle.

The entire experience is brief — two to three hours at most — and the descent is so gradual as to be almost imperceptible. You simply notice, at some point, that the tissue paper has been removed and the world is back to its usual density. There is no crash, no rebound anxiety, no lingering stimulation. Sleep comes easily if the timing is right. The compound leaves behind almost nothing — no afterglow, no residual warmth, just a quiet return to baseline, as though you had taken a very brief and very mild vacation from the weight of being yourself.

Interactions

Substance	Status	Note
Acetylfentanyl	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Buprenorphine	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Codeine	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Desomorphine	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Dextropropoxyphene	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Dihydrocodeine	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Ethylmorphine	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Fentanyl	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Heroin	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Hydrocodone	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Hydromorphone	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Kratom	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Methadone	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Morphine	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Naloxone	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
O-Desmethyltramadol	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Oxycodone	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Oxymorphone	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
Pethidine	Dangerous	Both cause respiratory depression and unconsciousness; vomiting while dissociated risks aspiration
1,4-Butanediol	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
2-Fluorodeschloroketamine	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
2M2B	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
3-Cl-PCP	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
3-HO-PCE	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
3-HO-PCP	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
3-MeO-PCE	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
3-MeO-PCP	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
4-MeO-PCP	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
5F-AKB48	Caution	Cannabis can intensify dissociation and increase confusion and disorientation
5F-PB-22	Caution	Cannabis can intensify dissociation and increase confusion and disorientation
AB-FUBINACA	Caution	Cannabis can intensify dissociation and increase confusion and disorientation
Alcohol	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Alprazolam	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Anandamide	Caution	Cannabis can intensify dissociation and increase confusion and disorientation
APICA	Caution	Cannabis can intensify dissociation and increase confusion and disorientation
Atropa belladonna	Caution	Unpredictable compounding of hallucinogenic effects with anticholinergic delirium
Baclofen	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Benzodiazepines	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Benzydamine	Caution	Unpredictable compounding of hallucinogenic effects with anticholinergic delirium
Cake	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Cannabidiol	Caution	Cannabis can intensify dissociation and increase confusion and disorientation
Cannabis	Caution	Cannabis can intensify dissociation and increase confusion and disorientation
Carisoprodol	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Clonazepam	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Clonazolam	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Clonidine	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Datura	Caution	Unpredictable compounding of hallucinogenic effects with anticholinergic delirium
Deschloroetizolam	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Deschloroketamine	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
Dextromethorphan	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
Diazepam	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Diclazepam	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Diphenhydramine	Caution	Unpredictable compounding of hallucinogenic effects with anticholinergic delirium
Diphenidine	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
Ephenidine	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
Eszopiclone	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Etizolam	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
F-Phenibut	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Flualprazolam	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Flubromazepam	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Flubromazolam	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Flunitrazepam	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Flunitrazolam	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Gabapentin	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Gaboxadol	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
GBL	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
GHB	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Grayanotoxin	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
HXE	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
Inhalants	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
JWH-018	Caution	Cannabis can intensify dissociation and increase confusion and disorientation
JWH-073	Caution	Cannabis can intensify dissociation and increase confusion and disorientation
Ketamine	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
Lorazepam	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Memantine	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
Mephenaqualone	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Methaqualone	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Methoxetamine	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
Methoxphenidine	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
Metizolam	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Midazolam	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Mirtazapine	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
MXiPr	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
Myristicin	Caution	Unpredictable compounding of hallucinogenic effects with anticholinergic delirium
Nicotine	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Nifoxipam	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Nitrous	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
O-PCE	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
PCE	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
PCP	Caution	Compounding dissociative effects can cause confusion, mania, and loss of motor control
Pentobarbital	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
Phenobarbital	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
SAMe	Caution	Both cause CNS depression; increased risk of vomiting, unconsciousness, and respiratory depression
1,3-Butanediol	Low Risk & Synergy	Produces unique synergistic effects; often combined
1B-LSD	Low Risk & Synergy	Produces unique synergistic effects; often combined
1cP-AL-LAD	Low Risk & Synergy	Produces unique synergistic effects; often combined
1cP-LSD	Low Risk & Synergy	Produces unique synergistic effects; often combined
1cP-MiPLA	Low Risk & Synergy	Produces unique synergistic effects; often combined
1P-ETH-LAD	Low Risk & Synergy	Produces unique synergistic effects; often combined
1P-LSD	Low Risk & Synergy	Produces unique synergistic effects; often combined
1V-LSD	Low Risk & Synergy	Produces unique synergistic effects; often combined
2,5-DMA	Low Risk & Synergy	Produces unique synergistic effects; often combined
25B-NBOH	Low Risk & Synergy	Produces unique synergistic effects; often combined
25B-NBOMe	Low Risk & Synergy	Produces unique synergistic effects; often combined
25C-NBOH	Low Risk & Synergy	Produces unique synergistic effects; often combined
25C-NBOMe	Low Risk & Synergy	Produces unique synergistic effects; often combined
25D-NBOMe	Low Risk & Synergy	Produces unique synergistic effects; often combined
25E-NBOH	Low Risk & Synergy	Produces unique synergistic effects; often combined
25I-NBOH	Low Risk & Synergy	Produces unique synergistic effects; often combined
25I-NBOMe	Low Risk & Synergy	Produces unique synergistic effects; often combined
25N-NBOMe	Low Risk & Synergy	Produces unique synergistic effects; often combined
2C-B	Low Risk & Synergy	Produces unique synergistic effects; often combined
2C-B-FLY	Low Risk & Synergy	Produces unique synergistic effects; often combined
2C-C	Low Risk & Synergy	Produces unique synergistic effects; often combined
2C-D	Low Risk & Synergy	Produces unique synergistic effects; often combined
2C-E	Low Risk & Synergy	Produces unique synergistic effects; often combined
2C-H	Low Risk & Synergy	Produces unique synergistic effects; often combined
2C-I	Low Risk & Synergy	Produces unique synergistic effects; often combined
2C-P	Low Risk & Synergy	Produces unique synergistic effects; often combined
2C-T	Low Risk & Synergy	Produces unique synergistic effects; often combined
2C-T-2	Low Risk & Synergy	Produces unique synergistic effects; often combined
2C-T-21	Low Risk & Synergy	Produces unique synergistic effects; often combined
2C-T-7	Low Risk & Synergy	Produces unique synergistic effects; often combined
3C-E	Low Risk & Synergy	Produces unique synergistic effects; often combined
3C-P	Low Risk & Synergy	Produces unique synergistic effects; often combined
4-AcO-DET	Low Risk & Synergy	Produces unique synergistic effects; often combined
4-AcO-DiPT	Low Risk & Synergy	Produces unique synergistic effects; often combined
4-AcO-DMT	Low Risk & Synergy	Produces unique synergistic effects; often combined
4-AcO-MET	Low Risk & Synergy	Produces unique synergistic effects; often combined
4-AcO-MiPT	Low Risk & Synergy	Produces unique synergistic effects; often combined
4-HO-DET	Low Risk & Synergy	Produces unique synergistic effects; often combined
4-HO-DiPT	Low Risk & Synergy	Produces unique synergistic effects; often combined
4-HO-DPT	Low Risk & Synergy	Produces unique synergistic effects; often combined
4-HO-EPT	Low Risk & Synergy	Produces unique synergistic effects; often combined
4-HO-MET	Low Risk & Synergy	Produces unique synergistic effects; often combined
4-HO-MiPT	Low Risk & Synergy	Produces unique synergistic effects; often combined
4-HO-MPT	Low Risk & Synergy	Produces unique synergistic effects; often combined
5-MeO-DALT	Low Risk & Synergy	Produces unique synergistic effects; often combined
5-MeO-DiBF	Low Risk & Synergy	Produces unique synergistic effects; often combined
5-MeO-DiPT	Low Risk & Synergy	Produces unique synergistic effects; often combined
5-MeO-DMT	Low Risk & Synergy	Produces unique synergistic effects; often combined
5-MeO-MiPT	Low Risk & Synergy	Produces unique synergistic effects; often combined
6-APB	Low Risk & Synergy	Produces unique synergistic effects; often combined
AL-LAD	Low Risk & Synergy	Produces unique synergistic effects; often combined
ALD-52	Low Risk & Synergy	Produces unique synergistic effects; often combined
Allylescaline	Low Risk & Synergy	Produces unique synergistic effects; often combined
Ayahuasca	Low Risk & Synergy	Produces unique synergistic effects; often combined
Bromo-DragonFLY	Low Risk & Synergy	Produces unique synergistic effects; often combined
Bufotenin	Low Risk & Synergy	Produces unique synergistic effects; often combined
DET	Low Risk & Synergy	Produces unique synergistic effects; often combined
DiPT	Low Risk & Synergy	Produces unique synergistic effects; often combined
DMT	Low Risk & Synergy	Produces unique synergistic effects; often combined
DOB	Low Risk & Synergy	Produces unique synergistic effects; often combined
DOC	Low Risk & Synergy	Produces unique synergistic effects; often combined
DOI	Low Risk & Synergy	Produces unique synergistic effects; often combined
DOM	Low Risk & Synergy	Produces unique synergistic effects; often combined
DPT	Low Risk & Synergy	Produces unique synergistic effects; often combined
Efavirenz	Low Risk & Synergy	Produces unique synergistic effects; often combined
EPT	Low Risk & Synergy	Produces unique synergistic effects; often combined
Escaline	Low Risk & Synergy	Produces unique synergistic effects; often combined
ETH-LAD	Low Risk & Synergy	Produces unique synergistic effects; often combined
Ibogaine	Low Risk & Synergy	Produces unique synergistic effects; often combined
LAE-32	Low Risk & Synergy	Produces unique synergistic effects; often combined
LSA	Low Risk & Synergy	Produces unique synergistic effects; often combined
LSD	Low Risk & Synergy	Produces unique synergistic effects; often combined
LSM-775	Low Risk & Synergy	Produces unique synergistic effects; often combined
LSZ	Low Risk & Synergy	Produces unique synergistic effects; often combined
MDA	Low Risk & Synergy	Produces unique synergistic effects; often combined
Mescaline	Low Risk & Synergy	Produces unique synergistic effects; often combined
MET	Low Risk & Synergy	Produces unique synergistic effects; often combined
Methallylescaline	Low Risk & Synergy	Produces unique synergistic effects; often combined
MiPLA	Low Risk & Synergy	Produces unique synergistic effects; often combined
MiPT	Low Risk & Synergy	Produces unique synergistic effects; often combined
MPT	Low Risk & Synergy	Produces unique synergistic effects; often combined
PARGY-LAD	Low Risk & Synergy	Produces unique synergistic effects; often combined
PRO-LAD	Low Risk & Synergy	Produces unique synergistic effects; often combined
Psilocybin Mushrooms	Low Risk & Synergy	Produces unique synergistic effects; often combined

Toxicity & Safety

Uncertainty as a Primary Risk Factor

The most important toxicity consideration for 3-MeO-PCMo is the absence of systematic safety data. No formal human toxicology studies exist. Adverse effects documented in community reports (which are sparse) cannot be systematically evaluated for frequency or severity.

Expected Risks by Analogy

Based on structural similarity to 3-MeO-PCP:

Mania and psychosis risk — the methoxy substitution that confers these risks in 3-MeO-PCP is present in 3-MeO-PCMo; mania risk should be assumed
Cardiovascular stimulation — elevated heart rate and blood pressure
Behavioral disinhibition — similar insidious impairment of judgment while feeling capable
Psychological dependence — euphoric and stimulant character creates potential for compulsive use

Urological Toxicity

As with all arylcyclohexylamines, regular use carries risk of bladder damage analogous to ketamine-associated cystitis.

Unknown Risks

The morpholine ring and its metabolism introduce uncertainties about unique metabolites or unexpected toxicities not present in the better-characterized 3-MeO-PCP. This pharmacological uncertainty should be weighted appropriately in risk assessment.

Addiction Potential

moderately addictive with a high potential for abuse

Overdose Information

Overdose on 3-MeO-PCMo can range from unpleasant to life-threatening depending on the dose, route, and whether other substances are involved.

Signs of overdose: Severe nystagmus, complete unresponsiveness, vomiting (aspiration risk while unconscious), severely depressed breathing, seizures, extremely elevated heart rate or blood pressure.

Critical dangers:

Respiratory depression: Particularly when combined with other depressants
Aspiration: Loss of protective reflexes combined with nausea creates choking risk
Hyperthermia or hypothermia: Impaired thermoregulation at high doses

Emergency response: Place the person in the recovery position. Monitor breathing. Call emergency services if breathing is slow, shallow, or irregular; if the person is unresponsive to stimulation; or if seizures occur. Be honest with medical personnel about what was consumed — they are there to help, not to judge.

Dangerous Interactions

The combinations listed below may be life-threatening. Independent research should always be conducted to ensure safety when combining substances.

AcetylfentanylDangerous