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2C-T
4-(methylthio)-2,5-dimethoxyphenethylamine
2C-T (2,5-dimethoxy-4-methylthiophenethylamine) — also known as Tesseract — is a synthetic psychedelic of the phenethylamine class. It is the parent compound of the 2C-T-x thio series, the least potent member of the lineage. It activates serotonin receptors, disrupting normal sensory filtering and producing a mild psychedelic state.[1]
2C-T (2,5-dimethoxy-4-methylthiophenethylamine) — also known as Tesseract — is a synthetic psychedelic of the phenethylamine class. It is the parent compound of the 2C-T-x thio series, the least potent member of the lineage. 2C-T is a partial agonist at 5-HT₂A receptors, producing its effects by disrupting serotonergic filtering of sensory and cognitive input.[1]
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Alexander Shulgin synthesized 2C-T in the early 1980s as part of a systematic study of sulfur-modified phenethylamines.[2] The compound itself saw little use, but its descendants — 2C-T-2 and 2C-T-7 — reached recreational markets and generated the clinical reports that define the series' safety profile.[3] 2C-T remains confined to psychonaut research communities, with negligible market presence.
Subjective effects include tactile sensitivity, introspection, mild visual distortion, and sedation. The character is quiet and inward — closer to contemplation than perceptual fireworks, described as "stoning" rather than stimulating.[4] Nausea and gastrointestinal discomfort are the most consistent unwanted effects.
2C-T produces no physical dependence, and no death has been specifically attributed to the compound. The main danger is combining it with monoamine oxidase inhibitors — drugs that slow its breakdown — which can intensify effects sharply and trigger a dangerous overheating and seizure response.[5] All human data come from four self-experiments; everything else is inferred from structurally related compounds.[4]
History[edit]
Discovery
Alexander Shulgin synthesized 2C-T at his private laboratory in Lafayette, California, working with Philip Jacob. Between 1981 and 1984 they published foundational structure-activity data establishing that a sulfur atom at the 4-position of the phenethylamine scaffold produces psychoactive compounds.[2][6][7] Shulgin later documented four self-experiments in PiHKAL (1991), describing 2C-T as having "relatively low potency" while noting that "the higher 2C-T's proved to be a treasure house".[4]
Scientific significance
2C-T matters structurally more than pharmacologically. It established the methylthio template from which more potent derivatives were built — extending the sulfur chain yielded 2C-T-2 and then 2C-T-7, each substantially more potent.[1] The early papers also revealed that these compounds are broken down by monoamine oxidase, a metabolic fact central to the series' safety profile.[2]
Market and modern context
2C-T never found meaningful recreational use. Its congeners 2C-T-2 and 2C-T-7 circulated in the late 1990s and 2000s — with 2C-T-7 explicitly scheduled in the United States in 2004[8] — while 2C-T remained within psychonaut research communities.[3][9]
The "2C" prefix marks the two-carbon chain between the benzene ring and the amino group — distinguishing phenethylamines from amphetamines. "T" stands for thio, the sulfur atom at the 4-position. This naming system was Shulgin's own convention for his 2,5-dimethoxyphenethylamine series. The street name "Tesseract" appears in community sources but not in peer-reviewed literature.[10]
Chemistry[edit]
Structural class
2C-T belongs to the 2C-x family of substituted phenethylamines, specifically the 2C-T-x thio sub-series. The defining feature is a methylthio (–SCH₃) group at the 4-position of the 2,5-dimethoxyphenethylamine scaffold, making it the shortest-chain and least potent member of the thio series. Extending that sulfur chain increases potency — ethylthio yields 2C-T-2, propylthio yields 2C-T-7.[1]
Molecular identity
| Molecular formula | C₁₁H₁₇NO₂S |
| Molecular weight | 227.33 g/mol |
The hydrochloride salt melts at 240–241 °C.[11] No solubility or stability data have been published.inferred
Pharmacology[edit]
Mechanism of action
2C-T produces its psychedelic effects by activating serotonin receptors in the brain.[1] Unlike stimulant phenethylamines, it has little effect on dopamine or norepinephrine systems — it is a serotonergic psychedelic, not a stimulant.[12]
Pharmacokinetics
The oral route is the only documented route. Onset is approximately 30–45 minutes,[11][13] with a total duration of 3–6 hours.[10][4] Peak effects are estimated at 1–2 hours based on analogy to 2C-B.[14]inferred
Monoamine oxidase enzymes break 2C-T down in the body — it is a substrate for these enzymes, not an inhibitor of them.[2] Drugs that block MAO slow this breakdown, intensifying and prolonging effects and raising the risk of serotonin syndrome.[5]
Neuroscience[edit]
Where it acts
2C-T is expected to act on the same brain circuits as other serotonergic psychedelics.[15] Serotonin receptor activation in the prefrontal cortex disrupts the brain's normal filtering of incoming sensory data, allowing more unfiltered perception to reach awareness. This also quiets the brain's self-referential network, correlating with altered introspection and the sense of ego dissolution some users report.
Why it matters
The leading theory of psychedelic action proposes that activating serotonin receptors loosens the brain's fixed assumptions, letting raw sensory experience temporarily reshape perception.[4] 2C-T's lower receptor affinity predicts a gentler version of this — consistent with reports of quiet introspection rather than overwhelming perceptual change. Whether it triggers neuroplastic effects such as new synaptic growth at human doses is unknown.
Key unresolved questions: whether 2C-T produces neuroplastic effects given its partial agonism and lower potency, what determines its short duration compared to other phenethylamine psychedelics, and whether the methylthio group's oxidation products contribute unique pharmacological properties not captured by binding assays.
inferred All neural mechanism claims above are extrapolated from the serotonergic psychedelic class. No substance-specific neuroimaging or electrophysiological data exist for 2C-T.
Subjective Effects[edit]
2C-T's character is defined by subtlety. Where other psychedelic phenethylamines lead with vivid perceptual distortion, 2C-T foregrounds tactile sensitivity, a sedating body state, and a quiet, inward-turning mood. Users consistently describe it as "stoning" rather than stimulating.[13]
Within the 2C-T-x series it is the mildest and briefest member. Its qualitative feel resembles mescaline — introspective, body-aware — but with far less visual intensity and across a much shorter timeframe.[4] Cannabis markedly amplifies its visual component.[13]
Alexander Shulgin synthesized 2C-T as part of a systematic exploration of sulfur-substituted phenethylamines, with the first peer-reviewed report appearing in 1981.[2] The compound itself saw minimal adoption, but its structural descendants — 2C-T-2 and 2C-T-7 — entered recreational markets and generated the clinical toxicology literature for the series. 2C-T remains largely confined to psychonaut research communities, with negligible presence on drug markets.[3]
Subjective effects include tactile enhancement, introspection, mild visual distortion, and sedation. The experience is gentle and inward-turning — a quiet, body-centered psychedelia closer to contemplation than perceptual fireworks, with users describing the state as "stoning" rather than stimulating.[4] Gastrointestinal discomfort is the most consistent unsought effect.
2C-T produces no physical dependence, and no fatalities have been attributed to the compound specifically. The principal acute risk is potentiation by monoamine oxidase inhibitors, which slow the compound's primary metabolic pathway and can precipitate serotonin syndrome;[5] broader class-level deaths have involved higher-potency congeners in polydrug contexts.[3] No controlled human studies have been conducted — all published human data derive from four self-experiments, and the current understanding rests almost entirely on structural analogy to better-characterized congeners.[4]
History[edit]
Discovery
Alexander Shulgin synthesized 2C-T at his private laboratory in Lafayette, California, as part of a systematic investigation of sulfur-substituted phenethylamines. Working with Philip Jacob, the pair published foundational structure-activity data in three papers between 1981 and 1984, establishing that a sulfur atom at the 4-position of the 2,5-dimethoxyphenethylamine scaffold produced compounds with psychoactive properties.[2][6][7] Shulgin later provided the definitive account of 2C-T's effects in PiHKAL (1991), Entry #39, documenting four self-experiments and noting that while 2C-T had "relatively low potency," the "higher 2C-T's proved to be a treasure house".[4]
Scientific significance
2C-T's importance is structural rather than pharmacological. As the parent compound of the 2C-T-x thio series, it established the methylthio template from which higher-potency derivatives were built — extending the sulfur chain to ethylthio yielded 2C-T-2, to propylthio yielded 2C-T-7, each substantially more potent.[1] The 1981–1984 papers also demonstrated that these thiophenethylamines served as substrates for monoamine oxidase, a metabolic relationship that would later prove central to the series' safety pharmacology.[2]
Market and modern context
2C-T has maintained a negligible presence on recreational drug markets. Its congeners 2C-T-2 and 2C-T-7 saw meaningful distribution in the late 1990s and 2000s — with 2C-T-7 attracting explicit Schedule I placement in the United States in 2004[8] — but 2C-T itself remained largely within psychonaut research communities, its lower potency and shorter duration offering limited appeal.[3][9]
The "2C" prefix denotes the two-carbon chain between the phenyl ring and the amino group, distinguishing phenethylamines from amphetamines (three-carbon chain). "T" indicates thio — the sulfur atom at the 4-position. This naming convention, established by Shulgin for his 2,5-dimethoxyphenethylamine series, remains standard in both scientific literature and community pharmacology. The street name "Tesseract" appears in community sources but is not documented in peer-reviewed literature.[10]
Chemistry[edit]
Structural class
2C-T belongs to the 2C-x family of substituted phenethylamines — specifically the 2C-T-x thio sub-series. The parent scaffold is 2,5-dimethoxyphenethylamine, with a methylthio (–SCH₃) group at the 4-position. This sulfur substitution defines the 2C-T-x series, within which 2C-T is the shortest-chain and least potent member.
Extending the thioether chain increases potency: ethylthio yields 2C-T-2, n-propylthio yields 2C-T-7, and butylthio yields 2C-T-19.[1] The sulfur atom distinguishes the 2C-T-x series from oxygen-bearing (2C-O) and unsubstituted (2C-H) analogues, conferring distinct receptor binding geometry and metabolic properties.
Molecular identity
| Molecular formula | C₁₁H₁₇NO₂S |
| Molecular weight | 227.33 g/mol |
The molecule comprises a benzene ring bearing two methoxy groups at positions 2 and 5, a methylthio group at position 4, and a two-carbon ethylamine chain.
Stereochemistry
2C-T is achiral — the two-carbon phenethylamine chain lacks a stereocenter, unlike its amphetamine analogue ALEPH-1 (DOT), which carries a chirality α-methyl group. No stereochemical considerations apply to dosing or pharmacological interpretation.
Physical properties
The hydrochloride salt melts at 240–241 °C.[11] No published data on solubility, stability, or degradation pathways exist. As a phenethylamine hydrochloride, it is expected to be water-soluble in salt form and stable under standard storage conditions.inferred
Pharmacology[edit]
Mechanism of action
2C-T produces its psychedelic effects primarily through partial agonism at serotonin 5-HT₂A receptors.[1] This places it in the same mechanistic class as mescaline, 2C-B, and other phenethylamine psychedelics — all of which activate 5-HT₂A to disrupt sensory gating and alter perception.
Unlike stimulant phenethylamines such as amphetamine, 2C-T shows negligible affinity for monoamine transporters (dopamine, norepinephrine, serotonin), confirming it as a serotonergic psychedelic rather than a stimulant.[12] The 2C-T-x class also shows partial agonism at 5-HT₂B receptors.[12]
2C-T's relationship to monoamine oxidase (MAO) is metabolic rather than inhibitory. The compound serves as a substrate for MAO — meaning these enzymes break it down — rather than acting as a meaningful inhibitor of them.[2] Related 2C compounds show weak MAO-A inhibition in laboratory assays, but at concentrations far below clinical relevance.[13] The practical consequence is that MAO inhibitor drugs slow 2C-T's breakdown, potentially intensifying and prolonging its effects.[5]
Pharmacokinetics
No pharmacokinetic studies have been published for 2C-T in humans or animals. Available parameters are estimated from structural analogy to 2C-B and from user reports.inferred
The only documented route is oral administration, with onset at approximately 30–45 minutes.[11][14] Peak effects are estimated at 1–2 hours based on 2C-B data,[15] with a total duration of 3–6 hours.[10][4]
Metabolism is presumed to proceed via oxidative deamination by MAO-A and MAO-B, with possible involvement of liver CYP450 enzymes. No metabolite identification studies, half-life measurements, or bioavailability data have been published for 2C-T.
Neuroscience[edit]
Where it acts
As a 5-HT₂A partial agonist, 2C-T is expected to engage the same neural circuitry as other serotonergic psychedelics.[16] The primary site of action is layer V pyramidal neurons in the prefrontal cortex, where 5-HT₂A activation disrupts the thalamus's role as a sensory gatekeeper — allowing unfiltered perceptual information to reach conscious awareness. This disruption also reduces the internal coherence of the default mode network, the brain system responsible for self-referential thought, correlating with experiences of ego dissolution and altered introspection.
Why it matters
The leading theoretical account of psychedelic action — the REBUS (Relaxed Beliefs Under Psychedelics) model — proposes that 5-HT₂A agonism loosens the brain's entrenched assumptions, allowing raw sensory data to reshape perception and belief. 2C-T's lower receptor affinity and shorter duration predict a milder version of this loosening, consistent with user reports of gentle introspection rather than profound perceptual overhaul.[4] Whether the compound engages neuroplasticity pathways — dendritic growth and new synaptic connections — at human-relevant doses remains unknown.
Key unresolved questions include whether 2C-T produces measurable neuroplastic effects given its partial agonism and lower potency, what determines its notably short duration compared to other phenethylamine psychedelics, and whether the methylthio group contributes unique pharmacological properties through its metabolites or oxidation products not captured by standard binding assays.
inferred All neural mechanism claims above are extrapolated from the serotonergic psychedelic class. No substance-specific neuroimaging or electrophysiological data exist for 2C-T.
Subjective Effects[edit]
2C-T's experiential signature is defined more by subtlety than intensity. Where most psychedelic phenethylamines produce vivid perceptual distortion as a central feature, 2C-T foregrounds tactile sensitivity, gentle introspection, and a sedating body state that users describe as "stoning" rather than stimulating. The experience is notably sensitive to set and setting; cannabis co-administration markedly amplifies the otherwise subdued visual component.[14]
Within the 2C-T-x series, 2C-T occupies the role of the mild, short-acting parent compound. Its qualitative character is broadly comparable to mescaline — introspective and body-aware — but at a fraction of the visual intensity, without the pronounced body load, and across a considerably shorter timeframe.[4]
Effect Grid
The common dose range (60–100 mg) represents the core 2C-T experience as documented in PiHKAL. Tactile sensitivity becomes clearly noticeable — touch feels enhanced and surfaces more textured. Introspection deepens, with emotional openness and a gentle empathogenic quality. Thoughts flow more freely, and aesthetic appreciation may be heightened. Verbal communication remains easy and natural; one PiHKAL subject described the state as one that "opens things up but doesn't get in the way."
Visual effects are minimal at common doses — mild color enhancement or saturation may be noticed, but geometric patterns and morphing are largely absent. The dominant body load is gastrointestinal: a persistent stomach pressure that some users find mildly uncomfortable. The overall character is sedating rather than stimulating, described as "stoning."
Total duration is 3–5 hours, with good sleep and residual well-being commonly reported afterward. This is the PiHKAL-documented range and the best-characterized tier for 2C-T.
Modeled from the effect's dose-dependence curve — not per-substance measurements.
Brightness alteration · Visual breathing · Music enhancement · Tracers · After-images · Touch enhancement · Auditory enhancement · Depth perception distortion · Environmental patterning · Light sensitivity · Peripheral vision distortion · Perspective distortion · Sound sensitivity · Spatial disorientation · Symmetrical texture repetition · Auditory distortion · Auditory misinterpretation · Holotropic state · Proprioceptive distortion · Synesthesia · Vestibular distortion · Visual haze / noise · Visual morphing · Visual acuity enhancement · Peripheral misidentification · Visual diffraction · Visual melting · Visual processing acceleration · Visual magnification · Internal hallucinations · Object transformations · Environmental orbism / cubism · External hallucinations · Object activation · Visual recursion · Visual scenery slicing · Auditory hallucinations · Perspective hallucinations · Visual flipping
After-images · Touch enhancement · Auditory enhancement · Depth perception distortion · Environmental patterning · Light sensitivity · Peripheral vision distortion · Perspective distortion · Sound sensitivity · Spatial disorientation · Symmetrical texture repetition · Auditory distortion · Auditory misinterpretation · Holotropic state · Proprioceptive distortion · Synesthesia · Vestibular distortion · Visual haze / noise · Visual morphing · Visual acuity enhancement · Peripheral misidentification · Visual diffraction · Visual melting · Visual processing acceleration · Visual magnification · Internal hallucinations · Object transformations · Environmental orbism / cubism · External hallucinations · Object activation · Visual recursion · Visual scenery slicing · Auditory hallucinations · Perspective hallucinations · Visual flipping
Wakefulness · Spontaneous body sensations · Nausea · Appetite suppression · Insomnia · Tingling / electric sensations · Vibrations / buzzing · Bodily lightness · Dizziness · Dry mouth · Heart rate perception changes · Laughter fits · Muscle tension · Physical fatigue · Restlessness · Tactile euphoria · Body schema distortion · Dehydration sensation · Excessive sweating · Sexual arousal enhancement · Temperature dysregulation · Breathing alteration · Diarrhea · Bruxism · Headache · Involuntary body movements · Nystagmus (eye wobbles) · Trembling · Vomiting · Abnormal heartbeat · Motor control enhancement · Bodily dissociation · Tactile hallucination
Appetite suppression · Insomnia · Tingling / electric sensations · Vibrations / buzzing · Bodily lightness · Dizziness · Dry mouth · Heart rate perception changes · Laughter fits · Muscle tension · Physical fatigue · Restlessness · Tactile euphoria · Body schema distortion · Dehydration sensation · Excessive sweating · Sexual arousal enhancement · Breathing alteration · Diarrhea · Bruxism · Headache · Involuntary body movements · Nystagmus (eye wobbles) · Trembling · Vomiting · Abnormal heartbeat · Motor control enhancement · Bodily dissociation · Tactile hallucination
Cognitive flexibility · Introspection enhancement · Openness enhancement · Conceptual thinking · Cognitive euphoria · Increased nature relatedness · Thought connectivity · Immersion enhancement · Memory suppression · Thought acceleration · Creativity enhancement · Cognitive impairment · Memory fragmentation · Multiple thought streams · Synchronicity · Analysis enhancement · Humor enhancement · Thought loops · Analysis suppression · Cognitive fatigue · Confusion · Focus suppression · Information processing suppression · Thought disorganization · Focus enhancement · Information processing enhancement · Language enhancement · Cognitive dysphoria · Language suppression · Memory replays · Delusions
Conceptual thinking · Cognitive euphoria · Increased nature relatedness · Thought connectivity · Immersion enhancement · Memory suppression · Thought acceleration · Creativity enhancement · Cognitive impairment · Memory fragmentation · Multiple thought streams · Synchronicity · Analysis enhancement · Humor enhancement · Thought loops · Analysis suppression · Cognitive fatigue · Confusion · Focus suppression · Information processing suppression · Thought disorganization · Focus enhancement · Information processing enhancement · Language enhancement · Cognitive dysphoria · Language suppression · Memory replays
Empathy enhancement · Catharsis · Simultaneous emotions · Dysphoria · Irritability
Irritability
Trust enhancement · Sociability enhancement · Depersonalization · Communication enhancement · Flow state · Communication suppression · Ego inflation · Sociability suppression · Social disconnection · Boundary dissolution · Cognitive disconnection · Identity alteration · Ego dissolution
Flow state · Communication suppression · Ego inflation · Sociability suppression · Social disconnection · Boundary dissolution · Cognitive disconnection · Identity alteration · Ego dissolution
Transpersonal visions
Recursive awareness
Timeline
Initial alerts emerge — mild body awareness, possible faint stomach pressure, and a subtle shift in baseline mood. Effects are ambiguous and may be mistaken for placebo.
Tactile sensitivity and mood shift develop progressively. Body load becomes noticeable as stomach pressure. The sedating character begins to establish itself.
Full expression of effects — tactile enhancement, introspection, emotional openness, and a sedating body state. Visual effects remain minimal at common doses. Verbal communication is easy.
Effects thin progressively. Tactile sensitivity and introspective depth diminish. Stomach discomfort resolves.
Residual well-being and possible enhanced dreaming. Good sleep is commonly reported. Mood may feel subtly elevated into the following day.
Safety[edit]
- Acute toxicity
- Low
- Chronic toxicity
- Negligible
- Withdrawal
- None
- Tolerance buildup
- rapid
- Tolerance reset
- 7 days
- Physical
- None
- Psychological
- Negligible
- Compulsive redosing
- Negligible
- Dose escalation
- Negligible
- Cross-tol.
- LSD · psilo · mesc
Toxicity
No lethal dose data have been published for 2C-T in any species. No overdose case reports or fatalities specifically attributable to this compound appear in the medical literature.safety citation needed
Class-level toxicity
The broader 2C drug class has been linked to a recognizable pattern of toxicity at high doses[3]:
- Elevated heart rate and blood pressure, raised body temperature, heavy sweating
- Agitation, muscle jerking, tremor, and exaggerated reflexes
- Hallucinations, aggression, and extreme agitated confusion
- Seizures
At least five deaths have been reported across the 2C class, predominantly involving 2C-T-7 and 2C-T-2 — often combined with MDMA or other serotonergic drugs.[3] Agitated delirium was the most consistent feature in fatal cases.
5-HT₂B concern
The 2C-T-x class activates a receptor type linked to heart valve damage with chronic use.[12] Given 2C-T's minimal use and the improbability of repeated dosing, this risk is theoretical.
Psychological risks
2C-T carries the psychological risks common to psychedelics: anxiety, panic, paranoia, and transient psychotic symptoms — especially at higher doses or in predisposed individuals. One subject in Shulgin's PiHKAL accounts experienced emotional detachment at 75 mg, showing that dysphoric responses are possible within the common dose range.[4]
Persistent visual disturbances after the experience and any lasting psychiatric effects are inferred from the psychedelic class as a whole — no data exist specifically for 2C-T.inferred
Tolerance & dependence
Tolerance builds almost immediately after ingestion as serotonin receptors downregulate — a pattern shared across serotonergic psychedelics. Full reset takes approximately 7 days.[10] Cross-tolerance with LSD, psilocybin, and mescaline is expected.
No evidence supports physical dependence or withdrawal. Serotonergic psychedelics carry low abuse liability.inferred
Drug Interactions
Serotonergic medications (SSRIs, SNRIs, tramadol, lithium) add to serotonin accumulation and carry overlapping risk.[16] SSRIs may also blunt psychedelic effects through downregulation, creating unpredictable interactions where both dampening and intensification are possible.
Stimulants (amphetamines, MDMA, cocaine) add cardiovascular strain — elevated blood pressure, heart rate, and body temperature. Combining MDMA with 2C-T-7 has been implicated in fatal cases.[3]
Lithium has been associated with seizures in combination with serotonergic psychedelics and is contraindicated on class grounds.safety citation needed
Cannabis markedly enhanced visual effects in the single available user report.[13]
Contraindications
7 knownAbsolute:
- Concurrent MAO inhibitor use — prescription MAOIs, reversible MAOIs, and MAO-inhibiting plant preparations (ayahuasca, Syrian rue): risk of serotonin syndrome and uncontrolled cardiovascular crisis[5]
- Concurrent lithium use — seizure risk documented for serotonergic psychedelic combinationssafety citation needed
- Personal or family history of psychotic disorders (schizophrenia, schizoaffective disorder) — serotonin receptor activation may trigger or worsen psychotic episodesinferred
Relative:
- Heart conditions — elevated blood pressure and heart rate; caution with pre-existing cardiovascular disease
- Bipolar disorder — risk of manic episode, particularly Type Iinferred
- Concurrent serotonergic medications (SSRIs, SNRIs, tramadol) — unpredictable interaction
- Pregnancy — no reproductive toxicity data; standard precautionary contraindication applies
Harm Reduction[edit]
Forms & Identification
2C-T circulates as a white to off-white powder (hydrochloride salt) and has never been manufactured at pharmaceutical grade. Purity varies between batches. Substitution or contamination with other 2C-series compounds — some far more potent — is a meaningful risk.
Reagent testing provides partial identification but cannot confirm purity or dose. A milligram-precision scale is essential — the active dose range (60–100 mg) is wide enough that estimation by eye invites dangerous variation.
Guidelines
- Test the substance with at minimum a Marquis reagent kit before use
- Weigh every dose on a milligram-precision scale — never estimate by eye
- Start low within the documented range — individual sensitivity varies, and no controlled dose-finding studies exist
- Eat lightly 2–3 hours beforehand to reduce nausea, the most consistent body-load effect
- Arrange a sitter — ideally someone experienced and sober, present for the duration
- Prepare the space — remove hazards, ensure comfortable temperature, have water and light food available
- Set a clear intention but hold it loosely — psychedelic experiences rarely follow a script
- Do not redose within the same session; tolerance develops immediately and additional material is unlikely to deepen effects
Set & Setting
2C-T's gentle, introspective character makes it sensitive to context. A calm, familiar environment with a trusted companion reduces the likelihood of anxiety or dysphoria. The 3–6 hour duration is manageable, but clearing the full day of obligations prevents time pressure from shaping the experience.
Avoid use during periods of acute psychological distress, grief, or emotional lability.
Aftercare & integration. The relatively short duration means the post-experience window opens sooner than with most psychedelics. Allow at least a full day for rest and reflection. Light meals, hydration, and gentle physical activity support recovery from any residual nausea or fatigue.
If the experience raised difficult emotions, writing about it within 24–48 hours helps consolidate insight before it fades. Persistent anxiety, intrusive imagery, or depersonalization lasting more than a few days warrants professional consultation.
Recovery & Support
Compulsive use of 2C-T is extremely unlikely given rapid tolerance and limited rewarding effects. However, patterns of repeated psychedelic use — even without physical dependence — can reflect unaddressed psychological needs.
If psychedelic use is interfering with daily functioning, relationships, or mental health, support is available through SAMHSA's National Helpline (1-800-662-4357), the Fireside Project psychedelic support line (62-FIRESIDE), or a therapist experienced with substance use and psychedelic integration.
Recovery resources, crisis lines, and support pathways → View all
Emergency Response
Recognizing an emergency: Most difficult moments on 2C-T involve anxiety, nausea, or transient confusion — uncomfortable but not medically dangerous. Seek immediate help if any of the following occur: seizure, loss of consciousness, chest pain, body temperature hot to the touch, or behavior suggesting complete disconnection from reality with risk of self-harm.
Immediate steps:
- 1. Stay with the person and speak calmly
- 2. Call emergency services if any red flags above are present
- 3. Do not restrain them unless they are in immediate physical danger
- 4. If unconscious and breathing, place them in the recovery position (on their side)
- 5. Keep them cool if overheating — remove excess clothing, apply cool cloths
- 6. Do not induce vomiting
What to tell the dispatcher: Name the substance (2C-T, a synthetic phenethylamine psychedelic), estimated dose, time of ingestion, and current symptoms. Good Samaritan laws in many jurisdictions protect people who call for help during a drug emergency.
Legal Status[edit]
2C-T occupies an ambiguous legal position in most jurisdictions — frequently captured under structural analog provisions or blanket phenethylamine controls rather than being individually named.
| Jurisdiction | Classification | Key provisions |
|---|---|---|
| United States | Not explicitly scheduled; Federal Analogue Act may apply | 2C-T is not individually listed in Schedule I. Its structural and pharmacological similarity to scheduled congeners (2C-T-2, 2C-T-7) may render it prosecutable as a Schedule I analogue when intended for human consumption[8]safety citation needed |
| United Kingdom | Class A (Misuse of Drugs Act 1971) | Controlled under the phenethylamine catch-all clause; possession, production, and supply carry the most severe penaltiescitation needed |
| Canada | Schedule III (Controlled Drugs and Substances Act) | Listed since 31 October 2016citation needed |
| Australia | Likely Schedule 9 (Prohibited Substance) | The 2C class is broadly scheduled under the Therapeutic Goods (Poisons Standard); explicit documentation for 2C-T specifically was not confirmedinferred |
| Germany | Controlled under BtMG analogue provisions | Related 2C compounds are controlled under the Betäubungsmittelgesetz; 2C-T's specific status depends on structural analogue interpretationcitation needed |
Analogue act considerations
In jurisdictions with structural analogue legislation, 2C-T's close relationship to explicitly scheduled compounds creates significant legal exposure. The Federal Analogue Act applies to substances substantially similar in chemical structure and pharmacological effect to Schedule I or II substances — criteria 2C-T meets with respect to 2C-T-2 and 2C-T-7. Prosecution under analogue provisions has been upheld for other 2C-series compounds.[9]
Safety[edit]
- Acute toxicity
- Low
- Chronic toxicity
- Negligible
- Withdrawal
- None
- Tolerance buildup
- rapid
- Tolerance reset
- 7 days
- Physical
- None
- Psychological
- Negligible
- Compulsive redosing
- Negligible
- Dose escalation
- Negligible
- Cross-tol.
- LSD · psilo · mesc
Toxicity
No lethal dose data have been published for 2C-T in any species, and no case reports of overdose or death attributable specifically to this compound appear in the medical literature.safety citation needed
Class-level toxicity
The broader 2C drug class has been linked to a recognizable pattern of toxicity at high doses[3]:
- Elevated heart rate and blood pressure, raised body temperature, heavy sweating
- Agitation, muscle jerking, tremor, and exaggerated reflexes
- Hallucinations, aggression, and extreme agitated confusion
- Seizures
At least five deaths have been reported across the 2C class, predominantly involving 2C-T-7 and 2C-T-2 — often combined with MDMA or other serotonergic drugs.[3] Agitated delirium was the most consistent feature in fatal cases.
5-HT₂B concern
The 2C-T-x class shows activity at serotonin₂B receptors.[12] Chronic stimulation of this receptor has been linked to heart valve damage in the context of long-term MDMA use and certain appetite suppressants. Given 2C-T's minimal use and the improbability of chronic repeated dosing, this risk is theoretical.
Psychological risks
2C-T carries the psychological risks common to serotonergic psychedelics: acute anxiety, panic, paranoia, and transient psychotic symptoms — particularly at higher doses or in predisposed individuals. Shulgin's PiHKAL accounts describe one subject experiencing emotional detachment — "a hooded cloak brought down over my head" — at 75 mg, indicating that dysphoric responses are possible even within the common dose range.[4]
No data on HPPD (HPPD), psychosis precipitation, or lasting psychiatric effects have been published for 2C-T. These risks are inferred from the psychedelic class as a whole.inferred
Tolerance & dependence
Tolerance to 2C-T develops almost immediately after ingestion, driven by rapid downregulation of 5-HT₂A receptors — a pattern shared across serotonergic psychedelics. Full tolerance reset is estimated at approximately 7 days.[10] Cross-tolerance with other 5-HT₂A agonists (LSD, psilocybin, mescaline) is expected.
No evidence supports physical dependence or withdrawal. Serotonergic psychedelics as a class carry low abuse liability.inferred The compound's minimal market presence — reflecting community consensus that it is less rewarding than its congeners — further limits dependence risk.
Drug Interactions
Serotonergic medications (SSRIs, SNRIs, tramadol, lithium) carry overlapping risk through additive serotonin accumulation.[17] SSRIs may also blunt psychedelic effects through chronic receptor downregulation, creating unpredictable interactions where both dampening and intensification are possible depending on dosing history.
Stimulants (amphetamines, MDMA, cocaine) add to cardiovascular strain — elevated blood pressure, heart rate, and body temperature. Combining MDMA with 2C-T-7 has been implicated in fatal cases.[3]
Lithium has been associated with seizures in combination with serotonergic psychedelics and is contraindicated on class grounds.safety citation needed
Cannabis markedly enhanced visual effects in the single available user report.[14]
Contraindications
7 knownAbsolute:
- Concurrent MAO inhibitor use — prescription MAOIs, reversible MAOIs, and MAO-inhibiting plant preparations (ayahuasca, Syrian rue): risk of serotonin syndrome and uncontrolled cardiovascular crisis[5]
- Concurrent lithium use — seizure risk documented for serotonergic psychedelic combinationssafety citation needed
- Personal or family history of psychotic disorders (schizophrenia, schizoaffective disorder) — 5-HT₂A activation may trigger or worsen psychotic episodesinferred
Relative:
- Heart conditions — 5-HT₂A/₂B activity produces elevated blood pressure and heart rate; caution with pre-existing cardiovascular disease
- Bipolar disorder — risk of manic episode, particularly Type Iinferred
- Concurrent serotonergic medications (SSRIs, SNRIs, tramadol) — unpredictable interaction
- Pregnancy — no reproductive toxicity data exist; standard precautionary contraindication applies
Harm Reduction[edit]
Forms & Identification
2C-T circulates exclusively as a white to off-white powder (hydrochloride salt) and has never been commercially manufactured at pharmaceutical grade. Because unregulated synthesis is the only source, purity varies between batches, and substitution or contamination with other 2C-series compounds — some far more potent — is a meaningful risk.
Reagent testing provides partial identification but cannot confirm purity or dosage. A milligram-precision scale is essential: the active dose range (60–100 mg) sits where estimation by eye invites dangerous variation.
Guidelines
- Test the substance with at minimum a Marquis reagent kit before use
- Weigh every dose on a milligram-precision scale — never estimate by eye
- Start low within the documented range — individual sensitivity varies, and no controlled dose-finding studies exist
- Eat lightly 2–3 hours beforehand to reduce nausea, the most consistent body-load effect
- Arrange a sitter — ideally someone experienced and sober, present for the duration
- Prepare the space — remove hazards, ensure comfortable temperature, have water and light food available
- Set a clear intention but hold it loosely — psychedelic experiences rarely follow a script
- Do not redose within the same session; tolerance develops immediately and additional material is unlikely to deepen effects
Set & Setting
2C-T's gentle, introspective character makes it sensitive to environmental and psychological context. A calm, familiar environment with a trusted companion available reduces the likelihood of anxiety or dysphoria. The 3–6 hour duration is manageable, but clearing the full day of obligations prevents time pressure from contaminating the experience.
Avoid use during periods of acute psychological distress, grief, or emotional lability.
Aftercare & integration. The relatively short duration of 2C-T means the post-experience window opens sooner than with most psychedelics. Allow at least a full day for rest and reflection. Light meals, hydration, and gentle physical activity support recovery from any residual nausea or fatigue.
If the experience raised difficult emotions or unexpected psychological material, writing about it within 24–48 hours helps consolidate insight before it fades. Talking with a trusted friend or an integration-trained therapist can provide structure for processing. Persistent anxiety, intrusive imagery, or depersonalization lasting more than a few days warrants professional consultation.
Recovery & Support
Compulsive use of 2C-T is extremely unlikely given rapid tolerance and limited rewarding effects. However, patterns of repeated psychedelic use — even without physical dependence — can reflect avoidance, escapism, or unaddressed psychological needs.
If psychedelic use is interfering with daily functioning, relationships, or mental health, support is available through SAMHSA's National Helpline (1-800-662-4357), the Fireside Project psychedelic support line (62-FIRESIDE), or a therapist experienced with substance use and psychedelic integration.
Recovery resources, crisis lines, and support pathways → View all
Emergency Response
Recognizing an emergency: Most difficult moments on 2C-T involve anxiety, nausea, or transient confusion — uncomfortable but not medically dangerous. Seek immediate help if any of the following occur: seizure, loss of consciousness, chest pain, body temperature hot to the touch, or behavior suggesting complete disconnection from reality with risk of self-harm.
Immediate steps:
- 1. Stay with the person and speak calmly
- 2. Call emergency services if any red flags above are present
- 3. Do not restrain them unless they are in immediate physical danger
- 4. If unconscious and breathing, place them in the recovery position (on their side)
- 5. Keep them cool if overheating — remove excess clothing, apply cool cloths
- 6. Do not induce vomiting
What to tell the dispatcher: Name the substance (2C-T, a synthetic phenethylamine psychedelic), estimated dose, time of ingestion, and current symptoms. Good Samaritan laws in many jurisdictions protect people who call for help during a drug emergency.
Legal Status[edit]
2C-T occupies an ambiguous legal position in most jurisdictions. While several of its congeners — particularly 2C-T-2, 2C-T-4, and 2C-T-7 — are explicitly scheduled, 2C-T itself is frequently captured under structural analog provisions or blanket phenethylamine controls rather than being individually named.
| Jurisdiction | Classification | Key provisions |
|---|---|---|
| United States | Not explicitly scheduled; Federal Analogue Act may apply | 2C-T is not individually named in Schedule I. Its structural and pharmacological similarity to scheduled congeners (2C-T-2, 2C-T-7) renders it potentially prosecutable as a Schedule I analogue under the Federal Analogue Act when intended for human consumption[8]safety citation needed |
| United Kingdom | Class A (Misuse of Drugs Act 1971) | Controlled under the phenethylamine catch-all clause; possession, production, and supply carry the most severe penaltiescitation needed |
| Canada | Schedule III (Controlled Drugs and Substances Act) | Listed since 31 October 2016citation needed |
| Australia | Likely Schedule 9 (Prohibited Substance) | The 2C class is broadly scheduled under the Therapeutic Goods (Poisons Standard); explicit documentation for 2C-T specifically was not confirmedinferred |
| Germany | Controlled under BtMG analogue provisions | Related 2C compounds are controlled under the Betäubungsmittelgesetz; 2C-T's specific status depends on structural analogue interpretationcitation needed |
Analogue act considerations
In jurisdictions with structural analogue legislation, 2C-T's close structural relationship to explicitly scheduled compounds creates significant legal exposure. The Federal Analogue Act in the United States applies to substances "substantially similar" in both chemical structure and pharmacological effect to Schedule I or II substances — criteria 2C-T meets with respect to 2C-T-2 and 2C-T-7. Prosecution under analogue provisions has been upheld for other 2C-series compounds.[9]
Frequently asked questions
How long does 2C-T last?
Total duration by route of administration — Oral: 3 – 6 hours. Ranges vary with dose and individual factors; see the duration table for onset, peak, and after-effect phases.
Where can I find dosage information for 2C-T?
Psychedex publishes a dosage table for 2C-T on this page covering these routes of administration: oral. Dose values are presented only in that table, always alongside their route of administration.
What are dangerous combinations with 2C-T?
The highest-severity documented interactions for 2C-T: Amphetamines (Lethal), MDMA, Amphetamines (Lethal), MDMA, MDA (Lethal), Psychedelics (Lethal), SNRIs (Lethal). See the interactions section for the full list with mechanisms and severity levels.
Is 2C-T addictive?
Psychedex records tolerance and dependence data rather than a yes/no rating. Recorded tolerance indicators for 2C-T: tolerance builds rapid; full reset takes 7 days; cross-tolerance develops with LSD, psilocybin, mescaline, DMT. See the article's dependence and safety sections for recorded dependence data.
experience reports
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First-person accounts of subjective effects, timing, and outcomes — submitted for harm reduction.
references
- [1] ^abcdHalberstadt AL, Luethi D, Hoener MC, Trachsel D, Brandt SD, Liechti ME (2023) Use of the head-twitch response to investigate the structure-activity relationships of 4-thio-substituted 2,5-dimethoxyphenylalkylamines — Psychopharmacology doi:10.1007/s00213-022-06279-2
- [2] ^abcdJacob P, Shulgin AT (1981) Sulfur analogues of psychotomimetic agents. Monothio analogues of mescaline and isomescaline. — Journal of Medicinal Chemistry PMID:7310812
- [3]
- [4]
- [5] ^abcdRached G, Campana A, Fiani D, et al. (2026) Safety and Efficacy of Monoamine Oxidase Inhibitors in Patients Who Use Psychoactive Substances — CNS Drugs doi:10.1007/s40263-025-01256-7
- [6] ^Jacob P, Shulgin AT (1983) Sulfur analogues of psychotomimetic agents. 2. Analogues of (2,5-dimethoxy-4-methylphenyl)- and (2,5-dimethoxy-4-ethylphenyl)isopropylamine. — Journal of Medicinal Chemistry PMID:6842515
references
- [1] ^abcdHalberstadt AL, Luethi D, Hoener MC, Trachsel D, Brandt SD, Liechti ME (2023) Use of the head-twitch response to investigate the structure-activity relationships of 4-thio-substituted 2,5-dimethoxyphenylalkylamines — Psychopharmacology doi:10.1007/s00213-022-06279-2
- [2] ^abcdJacob P, Shulgin AT (1981) Sulfur analogues of psychotomimetic agents. Monothio analogues of mescaline and isomescaline. — Journal of Medicinal Chemistry PMID:7310812
- [3]
- [4]
- [5] ^abcdRached G, Campana A, Fiani D, et al. (2026) Safety and Efficacy of Monoamine Oxidase Inhibitors in Patients Who Use Psychoactive Substances — CNS Drugs doi:10.1007/s40263-025-01256-7
- [6] ^Jacob P, Shulgin AT (1983) Sulfur analogues of psychotomimetic agents. 2. Analogues of (2,5-dimethoxy-4-methylphenyl)- and (2,5-dimethoxy-4-ethylphenyl)isopropylamine. — Journal of Medicinal Chemistry PMID:6842515