QuidelOrtho Corporation has added the ARK Fentanyl II assay to its US Vitros XT 7600 and 5600 Integrated Systems as well as its Vitros 4600 Chemistry System menu as a MicroTip Partnership Assay (MPA). This fentanyl assay can help hospital and emergency room professionals respond to the critical demand for enhanced opioid testing, allowing on-site fentanyl testing in less than 10 minutes to aid in immediate clinical decisions.