Which analgesic is dosed up to 1 mcg/kg by IN/IM/IV/IO to a max of 100 mcg for analgesia during pacing?

Which analgesic is dosed up to 1 mcg/kg by IN/IM/IV/IO to a max of 100 mcg for analgesia during pacing?

• A. Morphine Sulfate
• B. Fentanyl
• C. Hydromorphone
• D. Ketamine

Answer: (B)

Fentanyl is a potent, fast-acting opioid analgesic that can be given by several routes (intranasal, intramuscular, intravenou s, or intraosseous), making it highly versatile in the prehospital setting. The dosing of 1 mcg/kg up to a maximum of 100 mcg provides rapid, titratable pain relief with a short duration of action. This combination is ideal during pacing because it quickly reduces pain and sympathetic drive without causing prolonged sedation or significant hemodynamic instability. Fentanyl’s minimal histamine release helps avoid drops in blood pressure, which is especially important when the patient may already be compromised. Other analgesics don’t fit this dosing pattern as neatly. Morphine and hydromorphone have longer onset and duration, and morphine, in particular, can cause more histamine release and potential hypotension, making them less desirable in pacing scenarios where rapid, controllable analgesia is preferred. Ketamine provides analgesia but raises heart rate and blood pressure and is dissociative, which changes the patient’s mental status and can complicate pacing or assessment. Hence, fentanyl best matches the described dosing (1 mcg/kg up to 100 mcg) and route flexibility for analgesia during pacing.

Fentanyl is a potent, fast-acting opioid analgesic that can be given by several routes (intranasal, intramuscular, intravenou s, or intraosseous), making it highly versatile in the prehospital setting. The dosing of 1 mcg/kg up to a maximum of 100 mcg provides rapid, titratable pain relief with a short duration of action. This combination is ideal during pacing because it quickly reduces pain and sympathetic drive without causing prolonged sedation or significant hemodynamic instability. Fentanyl’s minimal histamine release helps avoid drops in blood pressure, which is especially important when the patient may already be compromised.

Other analgesics don’t fit this dosing pattern as neatly. Morphine and hydromorphone have longer onset and duration, and morphine, in particular, can cause more histamine release and potential hypotension, making them less desirable in pacing scenarios where rapid, controllable analgesia is preferred. Ketamine provides analgesia but raises heart rate and blood pressure and is dissociative, which changes the patient’s mental status and can complicate pacing or assessment. Hence, fentanyl best matches the described dosing (1 mcg/kg up to 100 mcg) and route flexibility for analgesia during pacing.