Labetalol
Combined Alpha-/Beta-Blocker- Drug Class
- Combined Alpha-/Beta-Blocker
- Mechanism of Action (MOA)
- Blocks β1, β2, and α1 receptors → ↓ heart rate/contractility plus vasodilation (↓ afterload).
- Clinical Notes
- Hypertensive emergencies and hypertension in pregnancy/preeclampsia (a first-line agent). IV for acute control; do not stop abruptly; contraindicated in bronchial asthma (β2 blockade).
- Source
- FDA label
Sources
Reviewed September 2026- FDA label — FDA / DailyMed
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