Hydralazine IV — Pregnancy Hypertension Calculator

Calculates IV hydralazine dosing for severe hypertension in pregnancy (preeclampsia/eclampsia). Dose: 5–10 mg IV over 2 minutes; repeat every 20–30 minutes as needed; maximum 20–30 mg per episode. Onset 10–20 minutes; duration 3–8 hours. Monitor fetal heart rate. Many centers now prefer IV labetalol or nicardipine due to hydralazine's unpredictable response.

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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 IV hydralazine dosing for severe hypertension in pregnancy (preeclampsia/eclampsia). Dose: 5–10 mg IV over 2 minutes; repeat every 20–30 minutes as needed; maximum 20–30 mg per episode. Onset 10–20 minutes; duration 3–8 hours. Monitor fetal heart rate. Many centers now prefer IV labetalol or nicardipine due to hydralazine's unpredictable response. Use the hydralazine iv pregnancy result to inform your calculation.

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Frequently Asked Questions