Labetalol IV — Hypertensive Emergency Dosing

Calculates IV labetalol dosing for hypertensive emergencies. Bolus: 20 mg IV over 2 minutes; may repeat 40–80 mg boluses q10 minutes; maximum cumulative bolus dose 300 mg. Maintenance infusion: 0.5–2 mg/min (mix 200 mg in 160 mL, run at 2 mL/min). Avoid in decompensated HF, asthma/COPD, cocaine hypertension, and bradycardia.

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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 IV labetalol dosing for hypertensive emergencies. Bolus: 20 mg IV over 2 minutes; may repeat 40–80 mg boluses q10 minutes; maximum cumulative bolus dose 300 mg. Maintenance infusion: 0.5–2 mg/min (mix 200 mg in 160 mL, run at 2 mL/min). Avoid in decompensated HF, asthma/COPD, cocaine hypertension, and bradycardia. Use the labetalol iv result to inform your calculation.

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