Synthetic marijuana is a dangerous substance due to its potency, ever-changing 
composition, and unpredictable side effects. Recently, brodifacoum-contaminated 
synthetic marijuana has led to multiple deaths and morbidity throughout the USA 
from severe coagulopathy associated with use of this strain of the drug 
(brodifacoum is a rodenticide and potent Vitamin K antagonist/anticoagulant). We 
describe the clinical and radiologic findings in two patients who were diagnosed 
with, and treated for, ingestion of this new strain of synthetic marijuana. The 
radiologic manifestations were most notable for hemorrhagic pyelitis/ureteritis. 
Both patients required hospitalization with Vitamin K supplementation. The 
radiologic and clinical pictures in these patients are important for 
radiologists to recognize in order to help guide appropriate patient management.