Drug interactions
Atenolol-chlorthalidone + Lofexidine
Severity: Major
Atenolol-chlorthalidone 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 heart rate and blood pressure through central alpha-2 agonism. Together with atenolol and chlorthalidone this can cause excessive bradycardia, hypotension and syncope.
What this interaction means in plain words
Atenolol-chlorthalidone 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.
Atenolol-chlorthalidone belongs to Cardiovascular; Lofexidine belongs to Central Nervous System.
Why it happens
Additive pharmacodynamic reductions in heart rate and blood pressure.
What to do
Monitor pulse and blood pressure frequently, particularly during lofexidine initiation and dose titration. Reduce or hold doses if symptomatic hypotension or bradycardia occurs.
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 Atenolol-chlorthalidone
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 Atenolol-chlorthalidone with Lofexidine?
MediHelp rates the interaction as major. Atenolol-chlorthalidone 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 heart rate and blood pressure through central alpha-2 agonism. Together with atenolol and chlorthalidone this can cause excessive bradycardia, hypotension and syncope.
How serious is the interaction between Atenolol-chlorthalidone 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: Monitor pulse and blood pressure frequently, particularly during lofexidine initiation and dose titration. Reduce or hold doses if symptomatic hypotension or bradycardia occurs.
What other medicines interact with Atenolol-chlorthalidone?
MediHelp also lists interactions of Atenolol-chlorthalidone with, for example, Acebutolol, Aldesleukin, Amiodarone. The full list is on the Atenolol-chlorthalidone page.
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