Fentanyl ICU Infusion & Bolus Dose Calculator

Calculates fentanyl dosing for ICU analgesia. Continuous infusion: 25–200 mcg/h (0.5–2 mcg/kg/h). Bolus for acute pain: 25–50 mcg IV, onset 1–2 minutes, duration 30–60 minutes. Half-life is short (~30–60 min) with single doses but becomes prolonged (>10 hours) with continuous infusion due to adipose and muscle tissue accumulation. Daily sedation interruptions improve outcomes.

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Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How to Use

Enter the values for the scenario you are assessing. Calculates fentanyl dosing for ICU analgesia. Continuous infusion: 25–200 mcg/h (0.5–2 mcg/kg/h). Bolus for acute pain: 25–50 mcg IV, onset 1–2 minutes, duration 30–60 minutes. Half-life is short (~30–60 min) with single doses but becomes prolonged (>10 hours) with continuous infusion due to adipose and muscle tissue accumulation. Daily sedation interruptions improve outcomes. Use the fentanyl icu infusion result to inform your calculation.

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