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Psychedelics Guide

More than 500 articles organized by substance and topic: psilocybin, LSD, ayahuasca, DMT, MDMA, mescaline and harm reduction. Rigorous information, without fear and without propaganda.

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Explore the largest archive on psychoactive substances, published since 1996

Psilocybin and Methamphetamine: How Brain Networks Reorganize

Psiconáutica Editorial Team · October 9, 2026 In briefA functional magnetic resonance imaging (fMRI) study compares the brains of people with methamphetamine use disorder before...

Common Drug Causes False-Positive MDMA Urine Test

Psiconáutica Editorial Team · October 9, 2026 In briefThree patients admitted in Algiers tested positive for MDMA on a rapid urine screen despite no consumption;...

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Cannabis and Self-Awareness: How It Alters the Sense of Self

How cannabis can alter the sense of self: corollary discharge, depersonalization, and self-awareness, including their neural basis and a critical review.

Ketamine Risks: Cystitis, Dependence, and the K-Hole

Recreational ketamine use is associated with cystitis, kidney damage, dependence, and extreme dissociation (the "K-hole"). Real risks and harm reduction.

Wild Lettuce and Lactucarium: The “Opium” That Wasn’t

Wild lettuce (Lactuca virosa) and its latex, lactucarium, once promised dreams and mild sedation. We review the history, science, and risks.

“The Celtic Pharmacopeia: Mushrooms, Nightshades, and Hemp”

The Celtic people originated in the Eurasian steppes some 3,000 years ago and spoke an Indo-European language. During the 6th century BCE, the Celts reached Galicia and Portugal, later penetrating Navarre and Aragon. The Celtic people never formed an empire, but established themselves in confederations of tribes. Their civilization flourished between the 4th and 3rd centuries BCE.

Hemp as Food: Real Nutrition and Myths About Hemp Seeds

In recent years, interest in healthy, balanced eating has grown. For nutritionists, hemp has emerged as a significant source of plant-based protein. Today, you can find tofu, burgers, beer, energy bars, flour, oils, and animal feed made from hemp.

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