How long does 4-HO-DiPT last?

The total duration of 4-HO-DiPT via oral is 2 hours to 4 hours. Onset typically occurs within 15 minutes to 30 minutes. Peak effects last 1 hour to 1.5 hours.

4-HO-DiPT — SubstanceWiki

Q: What is 4-HO-DiPT?

Chemical compound 4-HO-DiPT, also known as 4-hydroxy-N,N-diisopropyltryptamine or as iprocin, is a psychedelic drug of the tryptamine and 4-hydroxytryptamine families related to psilocin (4-HO-DMT). It is taken orally. The drug has an unusually fast onset, short duration, and narrow dose range. Amon

4-HO-DiPT, also known as 4-hydroxy-N,N-diisopropyltryptamine or as iprocin, is a psychedelic drug of the tryptamine and 4-hydroxytryptamine families related to psilocin (4-HO-DMT). It is taken orally. The drug has an unusually fast onset, short duration, and narrow dose range. Among orally administered psychedelics, it is one of the shortest-acting compounds known.

It acts as a non-selective serotonin receptor agonist, including of the serotonin 5-HT2A receptor. Unlike many other psychedelic tryptamines, the drug appears to have far lower potency as an agonist of the serotonin 5-HT2C receptor relative to the serotonin 5-HT2A receptor. It is a derivative of DiPT, a higher homologue of psilocin (4-HO-DMT) and 4-HO-DET, and a skeletal isomer of 4-HO-DPT.

4-HO-DiPT was first described in the scientific literature by 1977. It was later described in greater detail by Alexander Shulgin in his 1997 book TiHKAL (Tryptamines I Have Known and Loved). The drug was encountered as a novel designer drug by 2005. In the 2020s, a prodrug of 4-HO-DiPT known as luvesilocin (RE-104, FT-104; 4-GO-DiPT) was developed and is in clinical trials for the treatment of psychiatric disorders such as postpartum depression.

How It Feels

The onset of 4-HO-DiPT begins with a growing strangeness in the auditory field. Within twenty to forty minutes, sounds begin to acquire an uncanny quality — a slight warping, as though voices and ambient noise are being processed through some invisible filter. A ringing or buzzing may appear at the periphery of hearing, faint but persistent. Simultaneously, a body load builds: a heavy, somewhat queasy pressure in the abdomen, accompanied by vasoconstriction that sends cold tingling into the hands and feet. The overall onset sensation is more disorienting than most tryptamines, precisely because the auditory changes are so unusual and difficult to contextualize.

As the experience matures over the next hour, the auditory effects become pronounced and unmistakable. Pitch shifts are the signature phenomenon: voices drop or rise in tone, sometimes by as much as a full octave, creating a deeply surreal conversational experience. Music becomes almost unrecognizable — familiar melodies warp and stretch, harmonics shift, and the emotional character of sound is fundamentally altered. Rhythmic perception changes too; beats may seem to drag or accelerate independently of their actual tempo. The effect is less like hearing the world with enhanced clarity and more like hearing a parallel version of the world where the rules of acoustics are slightly different. Visually, the effects are present but secondary: mild color enhancement, soft geometric patterning, and a dreamy haze over the visual field.

The peak, reaching full intensity around two hours and lasting two to three hours more, can be a challenging territory. The persistent auditory distortion creates an underlying sense of unreality that permeates the headspace. Thoughts may feel circular or difficult to ground, and communication becomes effortful when voices sound so unfamiliar. The body load at peak can be considerable — nausea, muscle tension, and a general physical discomfort that sits uneasily alongside the perceptual strangeness. For those who can surrender to the experience, however, there is a genuinely fascinating dimension to it: the discovery that so much of how we understand reality is mediated through auditory anchoring, and that disrupting those anchors reshapes consciousness in unexpected ways.

The comedown is slow, spanning three to four hours, with auditory normality returning last. The body gradually relaxes, warmth returns to the extremities, and a tired but clear-headed calm settles in. The experience often leaves a lasting appreciation for the complexity and fragility of human hearing.

Subjective Effects

The effects listed below are based on the Subjective Effect Index (SEI), an open research literature based on anecdotal reports and personal analyses. They should be viewed with a healthy degree of skepticism. These effects will not necessarily occur in a predictable or reliable manner, although higher doses are more liable to induce the full spectrum of effects.

Physical Effects

Physical(8)

Body load— A diffuse, heavy physical discomfort involving tension, pressure, and malaise in the torso and limbs...
Increased heart rate— A noticeable acceleration of heartbeat that can range from a subtle awareness of one's pulse to a fo...
Muscle tension— Persistent partial contractions or tightening of muscles that produces uncomfortable stiffness, cram...
Nausea— An uncomfortable sensation of queasiness and stomach discomfort that may or may not lead to vomiting...
Pupil dilation— A visible enlargement of the pupil diameter (mydriasis) that can range from subtle widening to drama...
Seizure— Uncontrolled brain electrical activity causing convulsions and loss of consciousness -- a life-threa...
Stimulation— A state of heightened physical and mental energy characterized by increased wakefulness, elevated mo...
Vasoconstriction— A narrowing of blood vessels throughout the body that produces sensations of cold extremities, tingl...

Cognitive & Perceptual Effects

Visual(16)

After images— A visual phenomenon in which a faint, ghostly imprint of a previously viewed image persists in the v...
Brightness alteration— Perceived increase or decrease in environmental brightness beyond actual illumination levels, common...
Colour enhancement— An intensification of the brightness, vividness, and saturation of colors in the external environmen...
Colour shifting— The visual experience of colors on objects and surfaces cycling through continuous, fluid transforma...
Depth perception distortions— Alterations in how the distance of objects within the visual field is perceived, causing layers of s...
Diffraction— The experience of seeing rainbow-like spectrums of color and prismatic halos embedded within bright ...

Pharmacology

Like most psychedelic tryptamines, 4-HO-DiPT is thought to act principally as a 5-HT2A partial agonist. The psychedelic effects are believed to come from 4-HO-DiPT's binding efficacy at the 5-HT2A receptors. However, the role of these interactions and how they result in the psychedelic experience continues to remain elusive.

The toxicity and long-term health effects of recreational 4-HO-toxic dose is unknown. This is because 4-HO-DiPT is a research chemical with very little history of human usage.

Anecdotal reports from those who have tried 4-HO-DiPT suggests that there are no negative health effects attributed to simply trying it by itself at low to moderate doses and using it very sparingly (but nothing can be completely guaranteed). Independent research should always be done to ensure that a combination of two or more substances is safe before consumption.

It is strongly recommended that one use harm reduction practices when using this drug.

4-HO-not habit-forming, and the desire to use it can actually decrease with regular consumption. Like with most psychedelics, it is most often thought to be self-regulating.

Tolerance to the effects of 4-HO-almost immediately after ingestion. After that,37 days to be back at baseline (in the absence of further consumption). 4-HO-DiPT presents cross-tolerance with Cross-all psychedelics, meaning that after the consumption of 4-HO-DiPT all psychedelics will have a reduced effect.

Due to its relative obscurity, the possession and sale of 4-HO-DiPT is unscheduled in most countries.

Germany: 4-HO-DiPT is controlled under the NpSG (New Psychoactive Substances Act) as of July 18, 2019. Production and import with the aim to place it on the market, administration to another person, placing it on the market and trading is punishable. Possession is illegal but not punishable. The legislator considers it possible that orders of 4-HO-DiPT are punishable as an incitement to place it on the market.
Sweden: 4-HO-DiPT is classified as a "health hazard" under the act "Lagen om förbud mot vissa hälsofarliga varor" (translated to the "Act on the Prohibition of Certain Goods Dangerous to Health") as of March 1, 2005 in their regulation SFS 2005:26, making it illegal to sell or possess.
Switzerland: 4-HO-DiPT is not controlled under Buchstabe A, B, C and D. It could be considered legal.
United Kingdom: 4-HO-DiPT is a Class A drug in the United Kingdom as a result of the tryptamine catch-all clause.
United States: 4-HO-DiPT is unscheduled in the United States. It may be considered an analogue of psilocin (4-HO-DMT), a Schedule I drug under the Controlled Substances Act. As such, the sale for human consumption or the use for illicit non-medical or industrial intents and purposes could be prosecuted as crimes under the Federal Analogue Act.
Florida: 4-HO-DiPT is a Schedule I controlled substance in the state of Florida, making it illegal to buy, sell, or possess.
Responsible use
Research chemical
Psychedelic
Tryptamine
4-AcO-DiPT
DiPT
4-HO-DiPT (Wikipedia)
4-HO-DiPT (Erowid Vault)
4-HO-DiPT (TiHKAL / Isomer Design)
Community
The Big & Dandy 4-HO-DiPT Thread (Bluelight)

Detection Methods

Urine Detection

4-HO-DiPT is not targeted by standard immunoassay-based urine drug screens. Specialized LC-MS/MS methods can detect 4-substituted tryptamine metabolites in urine for approximately 24 to 48 hours after ingestion. The detection window is relatively short compared to many other drug classes due to the rapid hepatic metabolism and renal clearance of tryptamine compounds. Psilocin (4-HO-DMT) is the most commonly targeted analyte in specialized tryptamine panels, and structural analogs may or may not be captured depending on the specific method.

Blood and Serum Detection

Blood detection windows for 4-HO-DiPT are short, typically 4 to 12 hours after oral ingestion. Peak plasma concentrations of the active metabolite occur within 1 to 2 hours. The rapid first-pass metabolism means that parent compound concentrations in blood are often negligible for 4-AcO prodrugs, while 4-HO compounds themselves are measured directly. LC-MS/MS is required for reliable serum detection at the low concentrations involved.

Standard Drug Panel Inclusion

4-HO-DiPT is NOT included on standard 5-panel, 10-panel, or 12-panel drug screens. Tryptamines do not cross-react with immunoassay targets for any of the standard panel analytes (amphetamines, cannabinoids, cocaine metabolites, opiates, PCP, benzodiazepines, or barbiturates). Detection requires a specific request for tryptamine or novel psychoactive substance testing at a reference laboratory. Some extended forensic panels include psilocin, which may capture certain 4-substituted tryptamines, but this coverage is not guaranteed for all structural variants.

Confirmatory Methods

Confirmatory identification of 4-HO-DiPT relies on LC-MS/MS with reference standards specific to the compound or its expected metabolites. GC-MS can also be used following appropriate derivatization. Immunoassay-based methods for psilocybin and psilocin exist but show variable cross-reactivity with structural analogs and are not considered reliable for novel 4-substituted tryptamines. Reference laboratories specializing in novel psychoactive substances offer the most comprehensive detection capabilities.

Reagent Testing (Harm Reduction)

The Ehrlich reagent is the primary harm reduction tool for 4-HO-DiPT. A sample placed on the reagent should produce a purple to violet color change, confirming the presence of an indole ring system characteristic of tryptamines. This reaction is shared with LSD, psilocybin, DMT, and all indole-containing compounds, so it confirms the general class but not the specific identity. The Hofmann reagent provides a confirmatory blue to violet reaction for tryptamines. The Marquis reagent typically shows no reaction or a dark brown discoloration with 4-substituted tryptamines. A positive Ehrlich result significantly reduces the probability that the substance is a dangerous substitute such as an NBOMe compound.

Interactions

Substance	Status	Note
3-FMA	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
4-MMC	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
8-Chlorotheophylline	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Adrafinil	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Anandamide	Caution	Cannabis can unpredictably intensify psychedelic effects and increase anxiety
APICA	Caution	Cannabis can unpredictably intensify psychedelic effects and increase anxiety
Atropa belladonna	Caution	Unpredictable compounding of hallucinogenic effects with anticholinergic delirium
Benzydamine	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Bromantane	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Cannabidiol	Caution	Cannabis can unpredictably intensify psychedelic effects and increase anxiety
Datura	Caution	Unpredictable compounding of hallucinogenic effects with anticholinergic delirium
Dichloropane	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Diphenhydramine	Caution	Unpredictable compounding of hallucinogenic effects with anticholinergic delirium
Ephedrine	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Harmala alkaloid	Caution	MAOIs dramatically potentiate psychedelics; drastically reduce dose and exercise extreme caution
Hexedrone	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Methcathinone	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Nicotine	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Oxiracetam	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Peganum harmala	Caution	MAOIs dramatically potentiate psychedelics; drastically reduce dose and exercise extreme caution
Phenylpiracetam	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Rhodiola Rosea	Caution	Increases anxiety, cardiovascular stress, and psychological intensity
Cannabis	Uncertain	—
1,3-Butanediol	Low Risk & Synergy	Cross-tolerance exists; effects compound
25E-NBOH	Low Risk & Synergy	Cross-tolerance exists; effects compound
2C-T	Low Risk & Synergy	Cross-tolerance exists; effects compound
2C-T-2	Low Risk & Synergy	Cross-tolerance exists; effects compound
2C-T-21	Low Risk & Synergy	Cross-tolerance exists; effects compound
2C-T-7	Low Risk & Synergy	Cross-tolerance exists; effects compound
3-Cl-PCP	Low Risk & Synergy	Produces unique synergistic effects; often combined
3-HO-PCE	Low Risk & Synergy	Produces unique synergistic effects; often combined
3-HO-PCP	Low Risk & Synergy	Produces unique synergistic effects; often combined
3-MeO-PCE	Low Risk & Synergy	Produces unique synergistic effects; often combined
3-MeO-PCMo	Low Risk & Synergy	Produces unique synergistic effects; often combined
3-MeO-PCP	Low Risk & Synergy	Produces unique synergistic effects; often combined
4-MeO-PCP	Low Risk & Synergy	Produces unique synergistic effects; often combined
Allylescaline	Low Risk & Synergy	Cross-tolerance exists; effects compound
Ayahuasca	Low Risk & Synergy	Cross-tolerance exists; effects compound
Deschloroketamine	Low Risk & Synergy	Produces unique synergistic effects; often combined
DET	Low Risk & Synergy	Cross-tolerance exists; effects compound
Diphenidine	Low Risk & Synergy	Produces unique synergistic effects; often combined
DiPT	Low Risk & Synergy	Cross-tolerance exists; effects compound
DOM	Low Risk & Synergy	Cross-tolerance exists; effects compound
DPT	Low Risk & Synergy	Cross-tolerance exists; effects compound
Efavirenz	Low Risk & Synergy	Cross-tolerance exists; effects compound
Ephenidine	Low Risk & Synergy	Produces unique synergistic effects; often combined
EPT	Low Risk & Synergy	Cross-tolerance exists; effects compound
HXE	Low Risk & Synergy	Produces unique synergistic effects; often combined
Ibogaine	Low Risk & Synergy	Cross-tolerance exists; effects compound
Inhalants	Low Risk & Synergy	Produces unique synergistic effects; often combined
Memantine	Low Risk & Synergy	Produces unique synergistic effects; often combined
MET	Low Risk & Synergy	Cross-tolerance exists; effects compound
Methallylescaline	Low Risk & Synergy	Cross-tolerance exists; effects compound
MiPT	Low Risk & Synergy	Cross-tolerance exists; effects compound
MPT	Low Risk & Synergy	Cross-tolerance exists; effects compound
MXiPr	Low Risk & Synergy	Produces unique synergistic effects; often combined
O-PCE	Low Risk & Synergy	Produces unique synergistic effects; often combined
PCE	Low Risk & Synergy	Produces unique synergistic effects; often combined
Psilocybin Mushrooms	Low Risk & Synergy	Cross-tolerance exists; effects compound
Lorazepam	Low Risk & Decrease	Depressants dull psychedelic effects; benzodiazepines are commonly used as trip-killers

Showing 60 key interactions out of 79 total.

Toxicity & Safety

Further information: Research chemicals § Toxicity and harm potential, and Responsible use § Hallucinogens The toxicity and long-term health effects of recreational 4-HO-DiPT use do not seem to have been studied in any scientific context and the exact toxic dose is unknown. This is because 4-HO-DiPT is a research chemical with very little history of human usage.

It is strongly recommended that one use harm reduction practices when using this drug.

Tolerance and addiction potential

4-HO-DiPT is not habit-forming, and the desire to use it can actually decrease with regular consumption. Like with most psychedelics, it is most often thought to be self-regulating.

Tolerance to the effects of 4-HO-DiPT is built almost immediately after ingestion. After that, it takes about 3 days for the tolerance to be reduced to half and 7 days to be back at baseline (in the absence of further consumption). 4-HO-DiPT presents cross-tolerance with all psychedelics, meaning that after the consumption of 4-HO-DiPT all psychedelics will have a reduced effect.

Dangerous interactions

Warning: Many psychoactive substances that are reasonably safe to use on their own can suddenly become dangerous and even life-threatening when combined with certain other substances. The following list provides some known dangerous interactions (although it is not guaranteed to include all of them).

Always conduct independent research (e.g. Google, DuckDuckGo, PubMed) to ensure that a combination of two or more substances is safe to consume. Some of the listed interactions have been sourced from TripSit.

Lithium - Lithium is commonly prescribed for the treatment of bipolar disorder. There is a large body of anecdotal evidence that suggests taking it with psychedelics significantly increases the risk of psychosis and seizures. As a result, this combination is strictly discouraged.
Cannabis - Cannabis may have an unexpectedly strong and unpredictable synergy with the effects of 4-HO-DiPT. Caution is advised with this combination as it can significantly increase the risk of adverse psychological reactions like anxiety, paranoia, panic attacks, and psychosis. Users are advised to start off with only a fraction of their normal cannabis dose and take long breaks between hits to avoid unintentional overdose.
Stimulants - Stimulants like amphetamine, cocaine or methylphenidate affect many parts of the brain and alter dopaminergic function. This combination can increase the risk of anxiety, paranoia, panic attacks, and thought loops. This interaction may also result in an elevated risk of mania and psychosis.
Tramadol - Tramadol is well-documented to lower the seizure threshold and psychedelics may act to trigger seizures in susceptible individuals.

Addiction Potential

not habit-forming

Overdose Information

Fatal overdose from 4-HO-DiPT alone, at doses within the typical recreational range, is extremely unlikely based on the available evidence for classical psychedelics. The therapeutic index for most psychedelics is very wide.

However, psychological emergencies can occur and require appropriate response:

Severe anxiety, panic, or psychotic episodes
Dangerous behavior due to impaired reality testing
Self-harm in the context of a distressing experience

Emergency management: If someone is experiencing a severe adverse reaction, move them to a calm, quiet environment. Speak reassuringly. Do not restrain unless there is immediate danger. Benzodiazepines (if available and the person is conscious and able to swallow) can reduce acute anxiety. If psychotic symptoms, self-harm risk, or medical distress is present, seek emergency medical attention.Medical attention: Seek help immediately for seizures, extremely elevated body temperature, signs of serotonin syndrome (agitation, tremor, diarrhea, rapid heart rate), or if the substance consumed is uncertain.

4-HO-DiPT

Quick Dosage

Dosage

oral

Duration

oral

How It Feels

Subjective Effects

Physical Effects

Physical(8)

Cognitive & Perceptual Effects

Visual(16)

Pharmacology

Detection Methods

Urine Detection

Blood and Serum Detection

Standard Drug Panel Inclusion

Confirmatory Methods

Reagent Testing (Harm Reduction)

Interactions

History

Harm Reduction

Toxicity & Safety

Addiction Potential

Overdose Information

Tolerance

Cross-tolerances

Legal Status

Experience Reports (2)

Tips (8)

Community Discussions (1)

See Also

References (4)

Frequently Asked Questions

Cognitive(11)

Auditory(3)

Transpersonal(2)