Mescaline Dosage Guide

## Lethal Toxicity No human death from the pharmacological effects of mescaline alone has been documented. The estimated lethal-to-active dose ratio is approximately 24-fold based on animal data. A 2024 clinical study administered doses up to 800 mg to healthy volunteers without serious adverse events, consistent with mescaline's 5,700-year record of continuous human use. ## High-Dose Physiological Effects While not lethal, doses above 500-800 mg can produce significant physical distress: - **Severe nausea and vomiting** -- potentially prolonged, creating risk of dehydration and electrolyte imbalance, especially in hot environments - **Cardiovascular effects** -- tachycardia (20-40 bpm elevation) and moderate hypertension; clinically significant in those with pre-existing cardiovascular conditions - **Hyperthermia** -- elevated core body temperature, amplified by physical activity, dehydration, or warm environments - **Tremor and motor incoordination** -- impaired motor function and increased fall risk ## Psychological Emergencies The primary "overdose" risk with mescaline is psychological, not physiological: - **Panic reactions** -- intense anxiety and fear of dying, more likely at high doses or in unfamiliar settings - **Psychotic episodes** -- in those with personal or family history of psychotic disorders, mescaline can precipitate acute psychosis requiring hospitalization - **Prolonged depersonalization** -- persistent feelings of unreality that may need clinical attention ## Managing Adverse Reactions If someone is having a severe reaction: - **Reassurance first** -- calm, consistent verbal grounding: "You took a substance, it will wear off, you are safe" - **Environment** -- move to a quiet, dimly lit, comfortable space - **Hydration** -- slow sipping of water or electrolyte solution, especially after vomiting - **Benzodiazepines** -- diazepam (10-20 mg oral) or lorazepam (1-2 mg) reliably reduce panic without dangerous interaction - **Emergency services** -- call immediately for seizure, sustained high fever, chest pain, or unresponsiveness ## Dangerous Drug Interactions - **MAOIs** -- serotonin syndrome and hypertensive crisis risk; mescaline is an MAO-A substrate - **Lithium** -- seizure risk with all serotonergic psychedelics - **Stimulants** -- compounded cardiovascular stress