In April 2018, the Centers for Disease Control issued a Clinical Action alert to health care providers across the United States advising of 89 confirmed cases of "serious unexplained bleeding" in Illinois. The cases are still being studied; however, 63 of the patients reported synthetic cannabinoid use, and laboratory analysis confirmed brodifacoum , a rat poison that causes bleeding, in at least 18 patients. This has lead the CDC to state that "a working hypothesis is the synthetic cannabinoids were contaminated with brodifacoum". 
Once you have chosen a good synthetic urine brand, then you can begin planning on how to get it inside the facility where your drug test will take place. The most effective solution that people use nowadays are the Monkey Dong and the Monkey Whizz. And if you don't know what they are, they're synthetic urine kits or what we like to call "urination devices". The Monkey Dong is a fake penis with a bag attached to it where you can carry your synthetic urine in without anyone noticing. While the Monkey Whizz is a urination device made specifically for women. Both of which I have reviewed on this site, so you can check those out if you are really serious about passing this urinalysis.