# Comparative Acute Effects of LSD, Psilocybin and Mescaline

> **NCT04227756** · PHASE1 · COMPLETED · sponsor: **University Hospital, Basel, Switzerland** · enrollment: 32 (actual)

## Conditions studied

- Healthy

## Interventions

- **DRUG:** LSD
- **DRUG:** Psilocybin
- **DRUG:** Mescaline
- **OTHER:** Placebo

## Key facts

- **NCT ID:** NCT04227756
- **Lead sponsor:** University Hospital, Basel, Switzerland
- **Sponsor class:** OTHER
- **Phase:** PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2020-05-19
- **Primary completion:** 2022-09-02
- **Final completion:** 2022-09-02
- **Target enrollment:** 32 (ACTUAL)
- **Last updated:** 2024-01-24


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04227756

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04227756, "Comparative Acute Effects of LSD, Psilocybin and Mescaline". Retrieved via AI Analytics 2026-06-22 from https://api.ai-analytics.org/clinical/NCT04227756. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*