Contaminated synthetic cannabinoids caused a coagulopathy outbreak in Illinois, affecting 174 people and killing 5

The outbreak affected 174 reported patients and caused 5 deaths. The coagulopathy was caused not by synthetic cannabinoids themselves but by contamination with brodifacoum, bromadiol, and difenacoum, potent vitamin K antagonists used as rodenticides. This was the first reported instance of long-acting anticoagulant rodenticide poisoning on this widespread scale.

Public health crisis report documenting the 2018 Illinois outbreak of coagulopathy linked to contaminated synthetic cannabinoids. Chronicles the public health response, clinical management challenges, and lessons learned.

This outbreak demonstrated that the unregulated synthetic cannabinoid supply chain can introduce lethal contaminants, creating public health emergencies that overwhelm normal clinical and surveillance systems.

The contamination crisis illustrates the dangers of unregulated drug markets. Unlike quality-controlled pharmaceutical or even regulated cannabis products, synthetic cannabinoids from informal sources can contain any adulterant, with potentially fatal consequences.

Public health surveillance likely underestimated the true number of affected individuals. Limited information on how contamination entered the supply chain. Single geographic outbreak may not represent ongoing risk levels.