ResearchSafe

Mescaline (Mescaline (from peyote and San Pedro cactus))

Category: Psychedelics. Status: Schedule I (research compound).

One of the oldest known psychedelics, found in peyote and San Pedro cacti and used ceremonially for thousands of years. Of growing interest in modern mental-health research.

How it works

Activates serotonin 5-HT2A receptors, producing long-lasting changes in perception and mood. It is a phenethylamine rather than a tryptamine.

Key facts

  • Molecular weight: 211.26 g/mol
  • Half-life: ~6 hours
  • Bioavailability: Oral
  • Storage: Traditional/research settings only.

Dosing overview

  • Typical dose: Several hundred milligrams (study and traditional use)
  • Frequency: Occasional or ceremonial
  • Duration: Acute effects last 10-12 hours
  • Route: Oral

Protocol notes

  • Traditionally consumed by eating peyote buttons or drinking San Pedro cactus preparations in ceremony.
  • Pure mescaline is taken orally in measured doses in research or careful personal use.
  • Because it lasts 10-12 hours, the whole day is set aside.
  • Strong nausea early on is common, so people often have an empty stomach.

Reported benefits

  • Long history of ceremonial use
  • Survey data links use to wellbeing
  • Renewed research interest
  • Distinct phenethylamine profile

Possible side effects

  • Strong nausea and vomiting
  • Very long experience
  • Anxiety or fear
  • Raised heart rate and blood pressure

Research

  • Naturalistic study of mescaline use and mental health (2021): Survey participants commonly reported improvements in depression, anxiety and substance use after a mescaline experience.

Community reviews of Mescaline

Rated 4 out of 5 from 1 community review by ResearchSafe members.

  • scientist_maya rated it 4/5 - Quiet reset after a brutal winter stretch: I tried mescaline during a nasty stretch where work felt endless and my training had turned into a grind. Im a pharmacist on the East Coast, so my brain is usually running labels and numbers nonstop, which is charming in theory and annoying in practice. For me, the four weeks felt like someone turned the contrast up. I was less stuck in my own head and more patient at the gym. The only catch was a long, somewhat foggy comedown that made the next day feel sloppy.

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Community discussions about Mescaline

Research and educational reference only. Not medical advice.