Drug interactions
Labetalol + Metoprolol
Severity: Major
Labetalol and Metoprolol: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Both block beta receptors and labetalol also blocks alpha-1 receptors, so combining them duplicates therapy. It increases the risk of bradycardia, marked hypotension and AV block.
What this interaction means in plain words
Labetalol and Metoprolol can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Labetalol belongs to Cardiovascular; Metoprolol belongs to Cardiovascular.
Why it happens
Additive beta-adrenergic blockade plus alpha-1 blockade from labetalol.
What to do
Avoid combining; use one beta-blocker only. If overlap occurs, stop one and monitor heart rate and blood pressure.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Metoprolol
- Metoprolol + Thioridazine Contraindicated
- Amifostine + Metoprolol Major
- Amiodarone + Metoprolol Major
- Atenolol-chlorthalidone + Metoprolol Major
- Atenolol + Metoprolol Major
- Betaxolol + Metoprolol Major
Other interactions of Labetalol
- Amifostine + Labetalol Major
- Amiodarone + Labetalol Major
- Atenolol-chlorthalidone + Labetalol Major
- Atenolol + Labetalol Major
- Betaxolol + Labetalol Major
- Bisoprolol + Labetalol Major
Frequently asked questions
Can I take Labetalol with Metoprolol?
MediHelp rates the interaction as major. Labetalol and Metoprolol can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Both block beta receptors and labetalol also blocks alpha-1 receptors, so combining them duplicates therapy. It increases the risk of bradycardia, marked hypotension and AV block.
How serious is the interaction between Labetalol and Metoprolol?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid combining; use one beta-blocker only. If overlap occurs, stop one and monitor heart rate and blood pressure.
What other medicines interact with Metoprolol?
MediHelp also lists interactions of Metoprolol with, for example, Thioridazine, Amifostine, Amiodarone. The full list is on the Metoprolol page.
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