Isoproscaline

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Isoproscaline
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Clinical data
Other namesIP; 4-Isopropoxy-3,5-dimethoxyphenethylamine; 3,5-Dimethoxy-4-isopropoxyphenethylamine
Routes of
administration		Oral[1]
Drug classSerotonin receptor modulator; Serotonin 5-HT2A receptor agonist; Serotonergic psychedelic; Hallucinogen
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  • None
Pharmacokinetic data
Onset of action2 hours[1]
Duration of action10–16 hours[1]
Identifiers
  • 2-{3,5-dimethoxy-4-[(propan-2-yl)oxy]phenyl}ethan-1-amine
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Chemical and physical data
FormulaC13H21NO3
Molar mass239.315 g·mol−1
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Melting point163 to 164 °C (325 to 327 °F) (hydrochloride)
  • CC(C)Oc1c(cc(cc1OC)CCN)OC
  • InChI=1S/C13H21NO3/c1-9(2)17-13-11(15-3)7-10(5-6-14)8-12(13)16-4/h7-9H,5-6,14H2,1-4H3 checkY
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Data page
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Isoproscaline, also known as 4-isopropoxy-3,5-dimethoxyphenethylamine, is a psychedelic drug of the phenethylamine and scaline families related to mescaline.[1] It is closely related to proscaline and was first synthesized by David E. Nichols and colleagues.[2] The drug is taken orally.[1]

Use and effects

In his book PiHKAL (Phenethylamines I Have Known and Loved), Alexander Shulgin lists isoproscaline's dose as 40 to 80 mg orally and its duration as 10 to 16 hours.[1] The onset was described as slow and about 2 hours and the descent very slow and gradual and starting at about 6 or 7 hours.[1] The effects of isoproscaline included enhanced emotions, desire to move and dance, feelings of energy flow and freedom in the body, feelings of ecstasy, euphoria, meaningfulness, mental rejuvenation, enhanced sociability and conversation, body load, queasiness, nausea, discomfort, insomnia, and slight next-day irritability.[1] No visual changes or other sensory effects were mentioned.[1] Shulgin described isoproscaline as a "completely fascinating phenethylamine".[1]

Interactions

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Pharmacology

Pharmacodynamics

Isoproscaline shows affinity for the serotonin 5-HT2 receptors and acts as an agonist of the serotonin 5-HT2A receptor.[3]

Chemistry

Isoproscaline is in a class of compounds commonly known as phenethylamines, and the full chemical name is 2-(4-isopropoxy-3,5-dimethoxyphenyl)ethanamine.[1]

Synthesis

The chemical synthesis of isoproscaline has been described.[1]

Analogues

Analogues of isoproscaline include mescaline, escaline, proscaline, allylescaline, and methallylescaline, among others.[1]

Society and culture

Canada

Isoproscaline is not a controlled substance in Canada as of 2025.[4]

United Kingdom

In the UK, its highly likely that this compound would be covered by the "phenylethylamine amendment" to the misuse of drugs act likely rendering it a Class A controlled drug.

United States

Isoproscaline is unscheduled in the United States;[5] however, because of its close similarity in structure and effects to mescaline, possession and sale of isoproscaline may be subject to prosecution under the Federal Analog Act.

See also

References

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  1. ^ a b c d e f g h i j k l m Page Module:Citation/CS1/styles.css has no content.Shulgin, Alexander; Shulgin, Ann (September 1991). PiHKAL: A Chemical Love Story. Berkeley, California: Transform Press. ISBN 0-9630096-0-5. OCLC 25627628. Isoproscaline entry
  2. ^ Page Module:Citation/CS1/styles.css has no content.Nichols DE, Dyer DC (February 1977). "Lipophilicity and serotonin agonist activity in a series of 4-substituted mescaline analogues". J Med Chem. 20 (2): 299–301. doi:10.1021/jm00212a022. PMID 836502.
  3. ^ Page Module:Citation/CS1/styles.css has no content.Kolaczynska KE, Luethi D, Trachsel D, Hoener MC, Liechti ME (2021). "Receptor Interaction Profiles of 4-Alkoxy-3,5-Dimethoxy-Phenethylamines (Mescaline Derivatives) and Related Amphetamines". Front Pharmacol. 12 794254. doi:10.3389/fphar.2021.794254. PMC 8865417. PMID 35222010.
  4. ^ Page Module:Citation/CS1/styles.css has no content."Controlled Drugs and Substances Act". Department of Justice Canada. Retrieved 19 January 2026.
  5. ^ Page Module:Citation/CS1/styles.css has no content.Orange Book: List of Controlled Substances and Regulated Chemicals (January 2026) (PDF), United States: U.S. Department of Justice: Drug Enforcement Administration (DEA): Diversion Control Division, January 2026

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