Management of Hypertension in Pregnancy

Indications and Precautions

• The European Society of Cardiology recommends that short-acting nifedipine be used in the treatment of severe hypertension in pregnancy (BP ≥160/100 mmHg), but it is not considered a first-line medication 1, 2
• The use of nifedipine is recommended only in situations of hypertensive urgency or when other preferred medications (labetalol, methyldopa) are not available 1, 2

Risks and Adverse Effects

• Short-acting nifedipine can induce uncontrolled hypotension, especially when combined with magnesium sulfate, which can lead to fetal compromise 1, 2

Dosage and Administration

• The recommended dose for short-acting nifedipine in severe hypertension in pregnancy is 10-20 mg orally, which can be repeated after 30 minutes if necessary 3
• The immediate goal is to decrease mean arterial pressure by 15-25%, targeting values of 140-150 mmHg for systolic blood pressure and 90-100 mmHg for diastolic blood pressure 1, 2
• Sublingual administration of nifedipine is not recommended due to the risk of sudden hypotension 4, 5

Alternative Therapies

• Labetalol is considered safer and more effective for the intravenous treatment of severe preeclampsia 1, 2
• Methyldopa is the preferred medication for the treatment of chronic hypertension in pregnancy, especially when delivery is anticipated within 48 hours 6, 5
• If immediate-release nifedipine is not available and intravenous access has not been established, 200 mg of labetalol or 1.0-1.5 g of methyldopa can be administered orally 1, 2

Monitoring

• Close monitoring of blood pressure is essential in pregnant women when administering nifedipine, especially in combination with magnesium sulfate 3