Drug interactions
Labetalol + Lofexidine
Severity: Major
Labetalol and Lofexidine: 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
Lofexidine lowers blood pressure and heart rate through central alpha-2 agonism, and labetalol adds further hypotensive and bradycardic effects. The combination may cause symptomatic hypotension, bradycardia and syncope.
What this interaction means in plain words
Labetalol and Lofexidine 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; Lofexidine belongs to Central Nervous System.
Why it happens
Additive pharmacodynamic reduction in sympathetic tone and heart rate from central alpha-2 agonism plus alpha/beta blockade.
What to do
Avoid if possible; if combined, monitor blood pressure and pulse before each dose and hold or reduce doses for hypotension or bradycardia. Counsel patients on orthostatic symptoms.
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 Labetalol
- Amifostine + Labetalol Major
- Amiodarone + Labetalol Major
- Atenolol-chlorthalidone + Labetalol Major
- Atenolol + Labetalol Major
- Betaxolol + Labetalol Major
- Bisoprolol + Labetalol Major
Other interactions of Lofexidine
- Adagrasib + Lofexidine Major
- Alfuzosin + Lofexidine Major
- Amiodarone + Lofexidine Major
- Amisulpride + Lofexidine Major
- Anagrelide + Lofexidine Major
- Apomorphine + Lofexidine Major
Frequently asked questions
Can I take Labetalol with Lofexidine?
MediHelp rates the interaction as major. Labetalol and Lofexidine 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. Lofexidine lowers blood pressure and heart rate through central alpha-2 agonism, and labetalol adds further hypotensive and bradycardic effects. The combination may cause symptomatic hypotension, bradycardia and syncope.
How serious is the interaction between Labetalol and Lofexidine?
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 if possible; if combined, monitor blood pressure and pulse before each dose and hold or reduce doses for hypotension or bradycardia. Counsel patients on orthostatic symptoms.
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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