Why might fentanyl be combined with drugs used for procedural sedation?

Fentanyl is a synthetic opioid analgesic known for its extreme potency and rapid onset of action. In clinical settings, it is frequently combined with other agents used for procedural sedation—such as propofol, ketamine, or midazolam—primarily to provide effective pain relief during minor surgical or diagnostic procedures.123

While sedative agents induce a state of drowsiness or unconsciousness, they do not always provide sufficient analgesia on their own. By adding fentanyl, physicians can ensure the patient remains comfortable and pain-free during the procedure. However, because fentanyl is a potent central nervous system depressant, its use requires careful monitoring; it can cause respiratory depression, where breathing slows or stops, particularly when combined with other sedatives. Ensuring patient safety through precise dosing and vigilant observation is an essential ethical priority in the administration of these medications.231