USA. Synthetic Cannabinoid Poisoning Outbreak Poses Challenges - Illinois AFP President Gives Firsthand Account of Treating These Patients 

The recent cases of severe bleeding linked to contaminated synthetic cannabinoids highlighted the advantages of a family medicine approach to managing a public health crisis, a physician in one of the hardest-hit outbreak areas told AAFP News.

As of May 9, the Illinois Department of Public Health (IDPH)(dph.illinois.gov) has received reports of 164 cases, including four deaths, linked to an outbreak that began March 7 and caused synthetic cannabinoid users to suffer from severe bleeding possibly linked to contamination from brodifacoum. 

According to an April 3 CDC Clinician Outreach and Communication Activity (COCA) outbreak alert update,(content.govdelivery.com) additional potentially related cases were reported in Florida, Indiana, Kentucky, Maryland, Missouri, Pennsylvania, Virginia and Wisconsin. 

Brodifacoum is a lethal 4-hydroxycoumarin vitamin K antagonist anticoagulant that is typically used as a rodenticide. (American Academy of Family Physicians, 18.05.2018)

https://www.aafp.org/news/health-of-the-public/20180518cannabinoids.html