What Are Fentanyl Overdose Symptoms? Fentanyl overdose symptoms occur when fentanyl suppresses the central nervous system strongly enough to interfere with consciousness and, most importantly, breathing. Fentanyl is a potent opioid agonist with legitimate medical applications in anesthesia and pain management. However, excessive exposure can produce life-threatening respiratory depression. Current U.S. prescribing information for fentanyl […]

