Fentanyl Infusion Dosing for Acute Pain Management in Adults

Dosing Considerations

• The National Comprehensive Cancer Network recommends calculating the 24-hour opioid requirement of the current medication when converting from another parenteral opioid to continuous IV fentanyl infusion 1, 2
• The National Comprehensive Cancer Network suggests using a conversion ratio of approximately 100 mcg fentanyl = 10 mg IV morphine (10:1 ratio) and reducing the dose by 25-50% to account for incomplete cross-tolerance if the previous opioid provided adequate analgesia 2
• The National Comprehensive Cancer Network recommends starting at 100% of the calculated dose if the previous opioid was ineffective, or increasing by 25% 2
• The guideline society recommends avoiding fentanyl in non-opioid-tolerant patients for continuous infusions without careful titration 4
• The guideline society warns to never apply heat to patients on fentanyl, as it accelerates absorption and can cause fatal overdose 4

Breakthrough Pain Management

• The National Comprehensive Cancer Network suggests providing 10-20% of the hourly rate as a bolus for breakthrough pain 3