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Systematic (IUPAC) name
Clinical data
Legal status
  • US: May be considered Illegal in US (Analogue of Psilocin)
Routes Oral
Pharmacokinetic data
Half-life 1-2 hrs
CAS number 63065-90-7 N
ATC code ?
ChemSpider 10579819 YesY
Chemical data
Formula C16H24N2O 
Mol. mass 260.38 g/mol
 N (what is this?)  (verify)

4-Hydroxy-di-isopropyl-tryptamine (4-HO-DiPT or Iprocin) is a synthetic psychedelic. It is a close structural analogue of psilocin and classified as a tryptamine derivative.


The effects of 4-HO-DiPT are broadly comparable to those of other serotonergic psychedelics such as LSD and psilocybin, but they are distinguished by their relative brevity. 4-HO-DiPT is orally active at 15-20 mg, and its effects last for 2-3 hours. Shulgin "doubt[s] that there is another psychedelic drug, anywhere, that can match this one for speed, for intensity, for brevity, and sensitive to dose, at least one that is active orally." An idiosyncratic effect of the drug, also noted by Shulgin, is its tendency to induce tremors.[1][2][3]

Some users have reported a minor audio distortion with lower dosages. Higher dosages increase the polarity of the distortion. It is defined as being slightly lower in pitch and creating several different effects, such as pitch bend, volume distortion, and rate distortion. As with most DiPT psychedelics, music can become more dissonant and less harmonious. Users have also reported a visual distortion widely comparable to the hallucinogen LSD.

Higher doses of 4-HO-DIPT, such as those above 30 mgs can increase the duration of the effects significantly.

Drug prohibition laws[edit]


Sveriges riksdags health ministry Statens folkhälsoinstitut classified 4-HO-DiPT as "health hazard" under the act Lagen om förbud mot vissa hälsofarliga varor (translated Act on the Prohibition of Certain Goods Dangerous to Health) as of Mar 1, 2005, in their regulation SFS 2005:26 listed as 4-hydroxi-N,N-diisopropyltryptamin (4-HO-DIPT), making it illegal to sell or possess.[4]


External links[edit]