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2C-P Facts

Psychedelic; Substituted phenethylamine; Serotonin 2A receptor agonist

Description

2C-P (2,5-dimethoxy-4-propylphenethylamine) is a synthetic psychedelic of the phenethylamine class. It activates serotonin receptors in the brain, producing the visual and cognitive shifts characteristic of classical psychedelics.

Subjective effects include geometric visual patterns, time alteration, conceptual thinking, euphoria, and ego dissolution. The experience is defined by its length — a slow-building, all-day alteration of perception and cognition demanding more planning and endurance than most psychedelics.

Physical dependence risk is low — rapid tolerance after a single dose limits compulsive use[1][2] — but the steep dose–response curve makes acute overdose a real hazard. The slow onset is the dominant danger: premature redosing can push a session into cardiovascular crisis.[3]

Dose and durationby route · individual sensitivity varies

Oral(mg)
Threshold< 2 mgLight3 – 5 mgCommon6 – 10 mgStrong10 – 14 mgHeavy16+ mg

Starts in 1 – 3 hoursLasts 10 – 20 hoursAfter-effects 8 – 24 hours

Body and dependence

Acute toxicity
Moderate
Chronic toxicity
Low
Physical dependence
None
Psychological dependence
Low
Withdrawal
None recorded
Compulsive redosing
Negligible

Tolerance

Builds
Rapid
Fully resets after
14 days
Carries over to
LSD; psilocybin; mescaline; 2C-B; 2C-E; 2C-I; 2C-D; DOI; DOM

Effectslikely at a common dose

Perception
Color enhancement; Visual drifting; Tracers; Color alteration; Depth perception distortion; After-images; Music enhancement; Symmetrical texture repetition; Brightness alteration; Environmental patterning; Geometry; Holotropic state; Light sensitivity; Perspective distortion; Sleep-transition hallucinations; Visual breathing; Visual morphing; +23 possible, including Spatial disorientation, Visual haze / noise, Vestibular distortion
Body
Stimulation; Spontaneous body sensations; Nausea; Pupil dilation; Wakefulness; Body high; Body scan awareness; Insomnia; +29 possible, including Heart rate perception changes, Vasoconstriction, Temperature dysregulation
Thinking
Introspection enhancement; Pattern recognition enhancement; Conceptual thinking; Multiple thought streams; Novelty enhancement; Thought loops; Immersion enhancement; Aesthetic enhancement; +27 possible, including Cognitive impairment, Confusion, Decision impairment
Feeling
Emotional enhancement; +10 possible, including Anxiety, Emotional lability, Dysphoria
Self
none likely · 13 possible, including Derealization, Depersonalization, Communication suppression
Time
Temporal disorientation; Time alteration; +3 possible
Transpersonal
none likely · 1 possible
Awareness
Personal insight; +4 possible

Who shouldn't take it

Absolute
Long QT syndrome; Psychotic disorders; Bipolar disorder; Pregnancy
Relative
Cardiovascular disease; Epilepsy; Hepatic impairment

Combinations61 recorded

Lethal (1)
MAOIs
Dangerous (18)
MDMA, MDA; NRIs; Buspirone; Dopamine agonists; GHB, Baclofen; GHB, GBL; Ibogaine; Ketamine, DXM, PCP; Lithium; Local anesthetics; MDMA, Amphetamines; NDRIs (Wellbutrin); Psychedelics; Salvia, Ibogaine; SNRIs; SSRIs; Stimulants; Synthetic cannabinoids
Caution (37)
See full page: psychedex.org/substances/2c-p
Not graded (5)
Not listed never means safe.

Seek help immediately if

Most difficulty is psychological (intense fear, panic, confusion) and passes with calm support — the signs below mean seek emergency help:

  • Very high body temperature; hot, dry skin
  • Seizures
  • Chest pain; fast or irregular heartbeat
  • Severe muscle rigidity, tremor, or twitching (possible serotonin syndrome)
  • Cold, pale, or blue fingers/toes — severe vasoconstriction (notably NBOMe / DOx)
  • Persistent vomiting; unconsciousness; uncontrollable agitation or risk of self-harm

What to do

  1. Stay calm and reassure — remind them they took a drug and the effect will pass
  2. Move to a calm, quiet, safe space with low light; reduce noise and sensory input
  3. Keep them from harm — they may act on fear or confusion; stay with them, don't leave them alone
  4. Talk them down gently; don't grab or restrain unless they're in danger
  5. For the medical signs above (overheating, seizure, chest pain, vasoconstriction, unresponsive) call emergency services
  6. If overheating, cool the body; be ready to give rescue breaths / CPR

The experience is time-limited and usually resolves with calm reassurance in a safe setting — psychological first aid, not medication. Serious physical harm is uncommon for classic psychedelics (LSD, psilocybin) but real for some potent phenethylamines (NBOMe, DOx), where hyperthermia, seizures, and vasoconstriction warrant emergency care.

988 Suicide & Crisis LifelineFireside Project: 62-FIRESIDE

Version r1 · Not medical advice

References

  1. [1]
    ^Buckholtz NS, Zhou DF, Freedman DX, Potter WZ (1990) Lysergic acid diethylamide (LSD) administration selectively downregulates serotonin2 receptors in rat brain — Neuropsychopharmacology PMID:1969270
  2. [2]
    ^de la Fuente Revenga M, Jaster AM, McGinn J, Silva G, Saha S, Gonzalez-Maeso J (2022) Tolerance and Cross-Tolerance among Psychedelic and Nonpsychedelic 5-HT2A Receptor Agonists in Mice — ACS Chemical Neuroscience doi:10.1021/acschemneuro.2c00170
  3. [3]
    ^Unknown (likely Liakoni/Liechti group) (2015) Report of five cases of 2,5-dimethoxy-4-(n)-propylphenethylamine (2C-P) intoxication following recreational use — Toxicology Reports Link
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