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Botanical illustration of Echinopsis Pachanoi
MedicinalSourced entry

Echinopsis Pachanoi

Echinopsis pachanoi

The San Pedro cactus of the Andes, used in traditional medicine for centuries. It contains mescaline, a hallucinogen, whose effects and safety are poorly studied.

Safety at a glance

  • PregnancyNothing recorded
  • BreastfeedingNothing recorded
  • MedicinesNothing recorded
  • Who should avoid itNothing recorded
  • AllergiesNothing recorded
  • Toxicity1 note →

Tap a box to read the safety notes below. “Nothing recorded” means our sources don't cover it, not that it's safe.

What is Echinopsis Pachanoi?

Plant family
Cactaceae, the cactus family
Parts used
The stem
Where it grows
The Andes of Ecuador and Peru
Genus
Echinopsis
Species
pachanoi

Also called

San Pedro Cactus

Traditional names

Huachuma

Older scientific names

Trichocereus pachanoi

Traditionally used for

  • Traditional ceremonies

Traditionally described as

  • Hallucinogenic

Natural compounds

Safety

Toxicity testing

  • San Pedro contains mescaline, a hallucinogen. Commonly reported effects include high blood pressure, headache, nausea and vomiting. Its safety hasn't been properly studied.[1]Review or trial

What does the research say?

Traditional use

These are traditional uses, not proven treatments.

  • San Pedro is one of the two main mescaline-containing cacti, with peyote. Mescaline-containing cacti have been used in traditional medicine for centuries.[1]Review or trial

Research in people

  • A 2026 review found only 10 usable studies of people taking mescaline or mescaline-containing plants. Some reported improvements in depression, well-being, nicotine and alcohol use, and obsessions. The studies were few and of very mixed quality, so no firm conclusions can be drawn.[1]Review or trial

In short

Contains the hallucinogen mescaline; it can raise blood pressure and cause nausea and vomiting.

Sources

  1. [1] The Ethnopharmacological Use of Mescaline for Psychiatric Disorders: A Systematic Review · DOI: 10.3390/ijms27073081Review or clinical trial

This information is educational and traditional in nature, and is not a substitute for professional medical advice. Unfamiliar word? See what these words mean.