How long does 4-HO-DPT last?

The total duration of 4-HO-DPT via insufflated is 4 hours to 6 hours. Onset typically occurs within 15 minutes to 45 minutes. Peak effects last 1 hour to 3 hours.

4-HO-DPT — SubstanceWiki

Q: What is 4-HO-DPT?

Chemical compound 4-HO-DPT, also known as 4-hydroxy-N,N-dipropyltryptamine or as deprocin, is a psychedelic drug of the tryptamine and 4-hydroxytryptamine families related to psilocin (4-HO-DMT). It is taken orally. The drug acts as a non-selective serotonin receptor agonist, including of the seroto

4-HO-DPT, also known as 4-hydroxy-N,N-dipropyltryptamine or as deprocin, is a psychedelic drug of the tryptamine and 4-hydroxytryptamine families related to psilocin (4-HO-DMT). It is taken orally.

The drug acts as a non-selective serotonin receptor agonist, including of the serotonin 5-HT2A receptor. It produces psychedelic-like effects in animals. The drug is closely structurally related to other psychedelic tryptamines such as dipropyltryptamine (DPT), 5-MeO-DPT, and psilocin (4-HO-DMT), among others.

4-HO-DPT was first described in the scientific literature by David Repke and colleagues in 1977. It was encountered as a novel designer drug in 2012. A presumed prodrug, 4-AcO-DPT, is also known, and has likewise been encountered as a designer drug.

Harm Reduction

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 p...

How It Feels

The onset of 4-HO-DPT is slow and deliberate, building over forty-five minutes to an hour with a gravity that signals something substantial approaching. A deep, diffuse body buzz spreads through the torso, heavy and electric, while nausea builds more insistently than with lighter tryptamines. There is a gradual darkening of mood — not depression, exactly, but a solemn quality, as though the mind is preparing itself for something serious. Colors begin to deepen and saturate, shadows thicken, and the visual field takes on a moody, almost cinematic quality.

As the come-up progresses, the depth of the experience becomes apparent. Visual distortions emerge with considerable intensity: surfaces undulate and flow, patterns ripple through textures with a complexity that suggests intelligence or design, and closed-eye visuals plunge into vast, dark, intricately structured spaces. The visual palette tends toward the rich and somber — deep purples, dark golds, blacks that shimmer with hidden color. The geometry is complex and layered, suggesting alien architecture or biological structures seen at impossible magnification. Sounds become resonant and meaningful, each one seeming to carry weight and significance.

The peak is long and formidable, establishing itself around two hours in and persisting for three to five hours. This is where 4-HO-DPT distinguishes itself from lighter tryptamines: the depth of psychological engagement is extraordinary. The mind is drawn into territories of memory, meaning, and identity that are usually accessible only in the deepest psychedelic states. Ego dissolution is common at higher doses, arriving not as a gentle softening but as a fundamental dismantling. Many report encounters with what feels like transcendent intelligence, or moments of illumination where complex truths about self and existence are apprehended directly, without the mediation of language. The body may feel alternately absent and overwhelming — waves of sensation that are difficult to categorize as either pleasant or unpleasant.

The descent from 4-HO-DPT is extended and contemplative, spanning three to four hours. The intensity slowly ebbs, leaving behind a raw, opened quality — as though layers of psychological armor have been peeled away. Physical exhaustion is significant. The afterglow can last days and often carries a complex emotional character: gratitude mixed with awe, relief mixed with the lingering echo of whatever truths were encountered at the peak. The total experience spans eight to twelve hours, making it exceptionally long for a tryptamine, and demands both preparation and integration.

Pharmacology

Like with most psychedelic tryptamines, 4-HO-DPT is thought to act principally as a 5-HT2A partial agonist. The psychedelic effects are believed to come from 4-HO-DPT'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.

In comparison to other tryptamines such as 4-AcO-DMT and 4-HO-DMT, it is extremely similar in terms of its visual, cognitive and physical effects although it feels somewhat less natural and slightly more synthetic. It is also worth noting that it lacks the extremely uncomfortable physical side effects which are present within its close structural relative DPT. This allows it to feel far more similar to that of a generic or classical substituted tryptamine such as psilocin.

The toxicity and long-term health effects of recreational 4-HO-toxic dose is unknown. This is because 4-HO-DPT is a research chemical with very little history of human usage. Anecdotal evidence from people within the psychonaut community who have tried 4-HO-DPT suggests that there are no negative health effects attributed to simply trying the drug 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-DPT presents cross-tolerance with Cross-all psychedelics, meaning that after the consumption of 4-HO-DPT all psychedelics will have a reduced effect.

Due to its relative obscurity, 4-HO-DPT is unscheduled in most countries.

Germany: 4-HO-DPT 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-DPT are punishable as an incitement to place it on the market.
Sweden: 4-HO-DPT is classified as a "dangerous substance", which means it requires a special permit to buy or sell. It is, however, not yet classified as a drug.
Switzerland: 4-HO-DPT is not controlled under Buchstabe A, B, C and D. It could be considered legal.
United Kingdom: 4-HO-DPT is a Class A drug in the United Kingdom as a result of the tryptamine catch-all clause.
United States: 4-HO-DPT is unscheduled in the United States. It may be considered an analogue of psilocin (which is a Schedule I drug under the Controlled Substances Act). As such, the sale for human consumption or could be prosecuted as crimes under the Federal Analogue Act.
Responsible use
Research chemical
DPT
4-HO-DMT
4-HO-MiPT
4-HO-MET
Tryptamine
4-HO-DPT (Wikipedia)
4-HO-DPT (TiHKAL / Isomer Design)
4-HO-DPT (Bluelight)

Detection Methods

Urine Detection

4-HO-DPT 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-DPT 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-DPT 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-DPT 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-DPT. 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-DPT use do not seem to have been studied in any scientific context and the exact toxic dose is unknown. This is because 4-HO-DPT is a research chemical with very little history of human usage. Anecdotal evidence from people within the psychonaut community who have tried 4-HO-DPT suggests that there are no negative health effects attributed to simply trying the drug 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.

Tolerance and addiction potential

4-HO-DPT 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-DPT 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-DPT presents cross-tolerance with all psychedelics, meaning that after the consumption of 4-HO-DPT 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-DPT. 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-DPT 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-DPT

Quick Dosage

Dosage

insufflated

oral

Duration

insufflated

oral

How It Feels

Subjective Effects

Physical Effects

Physical(2)

Cognitive & Perceptual Effects

Visual(2)

Cognitive(5)

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 (4)

See Also

References (4)

Frequently Asked Questions

Transpersonal(1)