How Long Does Fentanyl Stay in Your System? Urine, Blood, Hair, & Saliva
China and Mexico, two countries that see elements of fentanyl traffic to the United States, have stepped up measures to contain the flow of the drug. Canada has done the same, despite it being responsible for almost none of the fentanyl that winds up inside U.S. borders. President Trump has imposed steep tariffs on Canada, […]