Drug interactions
Labetalol + Neostigmine
Severity: Moderate
Labetalol and Neostigmine: moderate 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
Neostigmine increases vagal tone through cholinesterase inhibition, and labetalol blunts sympathetic compensation. Together they can produce additive slowing of heart rate and, occasionally, clinically important bradycardia or AV block.
What this interaction means in plain words
Labetalol and Neostigmine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Labetalol belongs to Cardiovascular; Neostigmine belongs to Central Nervous System.
Why it happens
Additive pharmacodynamic bradycardia from cholinergic stimulation plus beta-adrenergic blockade.
What to do
Monitor heart rate and ECG when neostigmine is given to patients on labetalol, for example during reversal of neuromuscular blockade. Have an antimuscarinic such as glycopyrrolate or atropine available.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Labetalol
- Amifostine + Labetalol Major
- Amiodarone + Labetalol Major
- Atenolol-chlorthalidone + Labetalol Major
- Atenolol + Labetalol Major
- Betaxolol + Labetalol Major
- Bisoprolol + Labetalol Major
Other interactions of Neostigmine
Frequently asked questions
Can I take Labetalol with Neostigmine?
MediHelp rates the interaction as moderate. Labetalol and Neostigmine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Neostigmine increases vagal tone through cholinesterase inhibition, and labetalol blunts sympathetic compensation. Together they can produce additive slowing of heart rate and, occasionally, clinically important bradycardia or AV block.
How serious is the interaction between Labetalol and Neostigmine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor heart rate and ECG when neostigmine is given to patients on labetalol, for example during reversal of neuromuscular blockade. Have an antimuscarinic such as glycopyrrolate or atropine available.
What other medicines interact with Labetalol?
MediHelp also lists interactions of Labetalol with, for example, Amifostine, Amiodarone, Atenolol-chlorthalidone. The full list is on the Labetalol page.
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