We report the case of a 17-year-old boy with a significant history of
drug and alcohol abuse, which included smoking marijuana mixed with br
odifacoum. As a consequence, the patient developed a prolonged coagulo
pathy that persisted for more than 1 year. To our knowledge, this is t
he first case reported in the literature in which super-warfarin intox
ication has been associated with marijuana smoking. This report should
increase the awareness of pathologists and clinicians when examining
a patient with a history of drug abuse who exhibits persistent vitamin
K-1-dependent coagulopathy.