Which of the following is the correct post-intubation analgesia dosing?

• A. Morphine 0.1 mg/kg
• B. Fentanyl 2 mcg/kg
• C. Hydromorphone 0.1 mg/kg
• D. Fentanyl 1 mcg/kg max 100 mcg

Answer: (D)

Post-intubation analgesia should use a rapid-onset, easily titratable opioid with a defined maximum to balance pain control with safety. Fentanyl fits this needs well: given IV, it works quickly (onset in about 1–2 minutes) and has a relatively short duration, which allows you to reassess and adjust dosing as the patient’s condition evolves after intubation. It also tends to have minimal hemodynamic disruption compared with other opioids, making it safer in the unstable or critically ill patient you often see after airway management.

Choosing a dose of fentanyl at 1 mcg/kg with a maximum of 100 mcg provides effective analgesia for most patients while preventing oversedation or respiratory compromise in larger individuals. The cap protects against excessive dosing when weight is high and helps maintain consistent safety across patients.

Morphine and hydromorphone take longer to onset and linger longer, which makes them less ideal for immediate post-intubation analgesia and can complicate titration. A higher per-kilogram dose of fentanyl without a cap (such as 2 mcg/kg) increases the risk of oversedation or respiratory depression, especially in the prehospital setting where patient monitoring may be more challenging.

So the best choice uses a weight-based fentanyl dose with a sensible maximum to deliver rapid, controllable analgesia after intubation.