1. a powerful synthetic opioid drug used medically to treat severe pain and as an anesthetic, often administered by injection, patch, or lozenge
Usage: medical/pharmaceutical term; controlled substance

Examples

• The patient was prescribed a fentanyl patch to manage chronic pain after surgery.
• Fentanyl is approximately 50 to 100 times more potent than morphine.
• Emergency responders carry naloxone to reverse fentanyl overdoses.
• The anesthesiologist administered fentanyl intravenously before the procedure.
• Fentanyl abuse has become a serious public health concern in recent years.