Last updated

Clinical data
Other names4-hydroxy-N-methyl-N-isopropyl tryptamine
Routes of
Oral, intranasal, rectal, IV, IM
ATC code
  • None
Legal status
Legal status
  • BR: Class F2 (Prohibited psychotropics) [1]
  • DE: NpSG (Industrial and scientific use only)
  • UK: Class A
  • US:Unscheduled
  • 3-{2-[methyl(propan-2-yl)amino]ethyl}-1H-indol-4-ol
CAS Number
PubChem CID
CompTox Dashboard (EPA)
Chemical and physical data
Formula C14H20N2O
Molar mass 232.327 g·mol−1
3D model (JSmol)
Melting point 123 to 125 °C (253 to 257 °F)
  • CN(C(C)C)CCC2=CNC1=CC=CC(O)=C12
  • InChI=1S/C14H20N2O/c1-10(2)16(3)8-7-11-9-15-12-5-4-6-13(17)14(11)12/h4-6,9-10,15,17H,7-8H2,1-3H3 Yes check.svgY
 X mark.svgNYes check.svgY  (what is this?)    (verify)

4-HO-MiPT (miprocin, 4-hydroxy-N-methyl-N-isopropyltryptamine) is a synthetic substituted aromatic compound and a lesser-known psychedelic tryptamine. It is thought to be a serotonergic psychedelic, similar to magic mushrooms, LSD and mescaline. [2] Its molecular structure and pharmacological effects somewhat resemble those of the tryptamine psilocin, which is the primary psychoactive chemical in magic mushrooms.



4-HO-MiPT was presumably first synthesized by Alexander Shulgin. Its synthesis is described in his book TiHKAL along with reports by people who had ingested the compound. Shulgin's trials and other anecdotal information suggest that 4-HO-MiPT is a synthetic psychedelic similar in activity to psilocin. It is relatively uncommon and has only a short history of human use.


Miprocin is the 4-hydroxyl analog of the chemical N-methyl-N-isopropyltryptamine as well as the isopropyl homolog and possible structural analog of 4-HO-DMT.

In August 2019, Chadeayne et al. solved the crystal structure of 4-HO-MiPT fumarate. [3] Its systematic name is [2-(4-hydroxy-1Hindol-3-yl)ethyl](methyl)propan-2-ylazanium 3-carboxyprop-2-enoate monohydrate. The salt consists of a protonated tryptammonium cation and a 3-carboxyacrylate (hydrogen fumarate) anion in the asymmetric unit along with a water molecule of crystallization.


4-HO-MiPT is thought to be a serotonergic psychedelic. [2] Like other serotonergic psychedelics, its method of action is believed to result from its partial agonism of 5-HT2A and 5-HT1A serotonin receptors. [2]


Very little is known about the toxicity of 4-HO-MiPT. Its chemical structure and pharmacological activity are very similar to psilocin, a compound which is not associated with compulsive use or physical dependence. However, because very little research has been done on 4-HO-MiPT, it cannot be definitively concluded that its pharmacological actions in the human body do not differ from those of psilocin. To date, there have been no reported deaths from 4-HO-MiPT.[ citation needed ]


Onset of action is 15 to 45 minutes and has a duration of 4 to 6 hours, depending on dose. The duration of action is one half-hour to two hours when injected IV.[ citation needed ]

Drug prohibition laws


Sveriges riksdags health ministry Statens folkhälsoinstitut classified 4-HO-MiPT 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 1 November 2005, in regulation SFS 2005:733 listed as "4-hydroxi-N,N-metylisopropyltryptamin (4-HO-MIPT)", making it illegal to sell or possess. [4]

United Kingdom

The substance could also be considered illegal in the UK under the Misuse of Drugs Act 1971.

United States

4-HO-MiPT is an unscheduled drug in the United States. However, it is arguably an analog of psilocin, which could lead to prosecution under the Federal Analog Act.


4-HO-MiPT is in Schedule 1 in Russia as an analog of 4-hydroxytryptamine.

See also

Related Research Articles

α-Methyltryptamine Chemical compound

α-Methyltryptamine is a psychedelic, stimulant, and entactogen drug of the tryptamine class. It was originally developed as an antidepressant by chemists at Upjohn in the 1960s, and was used briefly as an antidepressant in Russia under the trade name Indopan before being discontinued.

<span class="mw-page-title-main">2C-T-7</span> Psychedelic phenthylamine drug

2C-T-7 is a psychedelic phenethylamine of the 2C family. In his book PiHKAL: A Chemical Love Story, Alexander Shulgin lists the dosage range as 10–30 mg. 2C-T-7 is generally taken orally, and produces psychedelic and entactogenic effects that last 8 to 15 hours. Up until Operation Web Tryp and three deaths, two of which involved the use of other drugs in addition to 2C-T-7, and one which involved an excessive insufflated dose, 2C-T-7 was sold commercially in Dutch and Japanese smartshops and online. It is known on the streets as Blue Mystic or 7th Heaven. There has been little real research done on this chemical other than Shulgin's comments in PiHKAL and a few small animal studies mostly aimed at detecting metabolites.

<span class="mw-page-title-main">5-MeO-DiPT</span> Psychedelic tryptamine

5-Methoxy-N,N-diisopropyltryptamine is a psychedelic tryptamine and the methoxy derivative of diisopropyltryptamine (DiPT).

<span class="mw-page-title-main">4-HO-DiPT</span> Chemical compound

4-Hydroxy-N,N-diisopropyltryptamine is a synthetic psychedelic drug. It is a higher homologue of psilocin, 4-HO-DET, and is a positional isomer of 4-HO-DPT and has a tryptamine molecular sub-structure.

<span class="mw-page-title-main">Psilocin</span> Chemical compound

Psilocin is a substituted tryptamine alkaloid and a serotonergic psychedelic substance. It is present in most psychedelic mushrooms together with its phosphorylated counterpart psilocybin. Psilocin is a Schedule I drug under the Convention on Psychotropic Substances. Acting on the 5-HT2A receptors, psilocin modulates the production and reuptake of serotonin. The mind-altering effects of psilocin are highly variable and subjective and resemble those of LSD and DMT.

<span class="mw-page-title-main">DiPT</span> Chemical compound

Diisopropyltryptamine is a psychedelic hallucinogenic drug of the tryptamine family that has a unique effect. While the majority of hallucinogens affect the visual sense, DiPT is primarily aural.

<span class="mw-page-title-main">4-HO-DET</span> Chemical compound

4-HO-DET, also known as 4-hydroxy-diethyl-tryptamine, CZ-74, is a hallucinogenic drug and psychedelic compound of moderate duration. 4-HO-DET is a substituted tryptamine, structurally related to psilocin, ethocybin, and 4-HO-DIPT.

<span class="mw-page-title-main">4-AcO-DET</span> Chemical compound

4-Acetoxy-DET (4-Acetoxy-N,N-diethyltryptamine), also known as ethacetin, ethylacybin or 4-AcO-DET, is a psychedelic tryptamine. It was first synthesized in 1958 by Albert Hofmann in the Sandoz lab.

<span class="mw-page-title-main">5-MeO-MiPT</span> Chemical compound

5-MeO-MiPT is a psychedelic and hallucinogenic drug, used by some as an entheogen. It has structural and pharmacodynamic properties similar to the drugs 5-MeO-DiPT, DiPT, and MiPT. It is commonly used as a "substitute" for 5-MeO-DiPT because of the very similar structure and effects.

<span class="mw-page-title-main">4-Acetoxy-DiPT</span> Chemical compound

4-Acetoxy-DiPT is a synthetic psychedelic tryptamine. It is relatively uncommon and has only a short history of human use.

<span class="mw-page-title-main">MiPT</span> Chemical compound

N-methyl-N-isopropyltryptamine (MiPT) is a psychedelic tryptamine, closely related to DMT, DiPT and miprocin. It was first synthesized by David Repke in 1984 and was subsequently evaluated and described in Alexander Shulgin's 1997 book TiHKAL.

<span class="mw-page-title-main">4-HO-MET</span> Chemical compound

4-HO-MET is a lesser-known psychedelic drug. It is a structural and functional analog of psilocin as well as the 4-hydroxyl analog of methylethyltryptamine (MET). 4-HO-MET was first synthesized by Alexander Shulgin. In his book TiHKAL, the dosage is listed as 10-20 mg. 4-HO-MET produces psilocin-like distortion of color, sound, and form. Very little data exists about the pharmacological properties, metabolism, and toxicity of 4-HO-MET. There have been no reports of deaths from 4-HO-MET, despite the existence of anecdotal reports of the ingestion of up to 150 mg, more than an order of magnitude above the effective dose.

<span class="mw-page-title-main">4-HO-MPT</span> Chemical compound

4-Hydroxy-N-methyl-N-propyltryptamine, commonly known as 4-HO-MPT or meprocin, is a psychedelic drug in the tryptamine class of chemical compounds and is a higher homologue of the naturally occurring substituted tryptamine psilocin as well as being the 4-hydroxyl analog of MPT.

<span class="mw-page-title-main">4-MeO-MiPT</span> Chemical compound

4-MeO-MiPT, or 4-methoxy-N-methyl-N-isopropyltryptamine, is a lesser-known psychedelic drug. It is the 4-methoxy analog of MiPT. 4-MeO-MiPT was first synthesized by Alexander Shulgin and is mentioned in his book TiHKAL. Subsequent testing by Shulgin on human test subjects showed the effective dose as 20-30 mg ; the onset time between ingestion and the first noticeable effects was 45-60 min, with sensations lasting between 2-2.5 hours. The sensation were significantly milder than those of 4-HO-MiPT, with 4-MeO-MiPT producing erotic-enhancing effects, and few of the visuals common with tryptamines. Very little data exists about the pharmacological properties, metabolism, and toxicity of 4-MeO-MiPT.

<span class="mw-page-title-main">5,6-MDO-DMT</span> Chemical compound

5,6-MDO-DMT, or 5,6-methylenedioxy-N,N-dimethyltryptamine, is a lesser-known psychedelic drug. It is the 5,6-methylenedioxy analog of DMT. 5,6-MDO-DMT was first synthesized by Alexander Shulgin. In his book TiHKAL, 5,6-MDO-DMT produces no noticeable psychoactive effects, although it was only tested up to a dose of 5 mg. Very little data exists about the pharmacological properties, metabolism, and toxicity of 5,6-MDO-DMT.

<span class="mw-page-title-main">5,6-MDO-MiPT</span> Chemical compound

5,6-MDO-MiPT, or 5,6-methylenedioxy-N-methyl-N-isopropyltryptamine, is a lesser-known psychedelic drug. It is the 5,6-methylenedioxy analog of MiPT. 5,6-MDO-MiPT was first synthesized by Alexander Shulgin. In his book TiHKAL, 5,6-MDO-MiPT produces slight paresthesia at low doses. Very little data exists about the pharmacological properties, metabolism, and toxicity of 5,6-MDO-MiPT.

<span class="mw-page-title-main">5,6-MeO-MiPT</span> Chemical compound

5,6-MeO-MiPT, or 5,6-dimethoxy-N-methyl-N-isopropyltryptamine, is a lesser-known psychedelic drug. It is the 5,6-dimethoxy analog of MiPT. 5,6-MeO-MiPT was first synthesized by Alexander Shulgin. In his book TiHKAL, 5,6-MeO-MiPT produces no noticeable psychoactive effects. Very little data exists about the pharmacological properties, metabolism, and toxicity of 5,6-MeO-MiPT.

<span class="mw-page-title-main">Alpha,N-DMT</span> Chemical compound

Alpha,N-DMT, or α,N-dimethyltryptamine, is a lesser-known psychedelic drug. It is the α,N-dimethyl analog of DMT. α,N-DMT was first synthesized by Alexander Shulgin. In his book TiHKAL, Shulgin lists the dosage as 50-100 mg, and the duration as 6–8 hours. α,N-DMT causes an unpleasant body load. Very little data exists about the pharmacological properties, metabolism, and toxicity of α,N-DMT. α,N-DMT is known to be a potent monoamine oxidase inhibitor

<span class="mw-page-title-main">4-HO-αMT</span> Chemical compound

4-Hydroxy-α-methyltryptamine (4-HO-αMT) is a psychedelic drug of the tryptamine class. It is a close structural analogue of α-methyltryptamine (αMT) and produces similar effects to it, but with exacerbated side effects similarly to 5-MeO-αMT. Alexander Shulgin describes 4-HO-αMT briefly in his book TiHKAL:

The 4-hydroxy analogue of αMT has been looked at in human subjects. It is reported to be markedly visual in its effects, with some subjects reporting dizziness and a depressed feeling. There were, however, several toxic signs at doses of 15 to 20 milligrams orally, including abdominal pain, tachycardia, increased blood pressure and, with several people, headache and diarrhea.

<span class="mw-page-title-main">4-AcO-MiPT</span> Chemical compound

4-AcO-MiPT is a psychedelic tryptamine. It is closely related to O-acetylpsilocin and MiPT.


  1. Anvisa (24 July 2023). "RDC Nº 804 - Listas de Substâncias Entorpecentes, Psicotrópicas, Precursoras e Outras sob Controle Especial" [Collegiate Board Resolution No. 804 - Lists of Narcotic, Psychotropic, Precursor, and Other Substances under Special Control] (in Brazilian Portuguese). Diário Oficial da União (published 25 July 2023). Archived from the original on 27 August 2023. Retrieved 27 August 2023.
  2. 1 2 3 "4-HO-MiPT". Psychedelic Science Review. 6 January 2020. Retrieved 5 July 2022.
  3. Chadeayne AR, Pham DN, Golen JA, Manke DR (September 2019). "N-methyl derivatives of DMT and psilocin". Acta Crystallographica Section E. 75 (Pt 9): 1316–1320. doi: 10.1107/S2056989019011253 . PMC   6727059 . PMID   31523457.
  4. "Förordning om ändring i förordningen (1999:58) om förbud mot vissa hälsofarliga varor" [Regulation amending the Ordinance (1999: 58) on Prohibition against certain dangerous goods](PDF). Swedish Code of Statutes (in Swedish). 6 October 2005. Archived from the original (PDF) on 26 June 2021. Retrieved 6 September 2013.