Is LSD toxic?

Area of Science:

• Psychopharmacology
• Toxicology
• Forensic Medicine

Background:

• Lysergic acid diethylamide (LSD) has a complex history, initially explored for psychiatric treatment but also associated with recreational use and adverse outcomes.
• Physiological data indicate LSD is non-toxic and medically safe at standard dosages (50-200μg).
• Recent reports have erroneously attributed five sudden deaths to "LSD toxicity".

Purpose of the Study:

• To accurately identify the causes of fatalities previously misattributed to LSD toxicity.
• To clarify the physiological safety profile of LSD in light of renewed therapeutic interest.

Main Methods:

• Critical review of scientific literature and media reports concerning fatalities associated with LSD.
• Analysis of case details to differentiate between LSD effects, overdoses, and other contributing factors.

Main Results:

• Two of the five reported fatalities involved massive LSD overdoses.
• Two deaths resulted from cardiovascular collapse in individuals subjected to excessive physical restraint after taking standard LSD doses.
• One fatality was attributed to hyperthermia likely caused by a substituted drug (e.g., 25i-NBOMe), not LSD.

Conclusions:

• Fatalities attributed to LSD toxicity are often mischaracterized.
• True causes include massive overdoses, adverse events from physical restraints, and substitution with other potent psychoactive drugs.
• Accurate understanding is crucial for evaluating the therapeutic potential of LSD and other psychedelics.