Drug interactions
Chlorothiazide + Lofexidine
Severity: Moderate
Chlorothiazide and Lofexidine: 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
Both lower blood pressure, and lofexidine also slows the heart rate. Thiazide-related loss of potassium or magnesium may also add to arrhythmia risk because lofexidine can prolong the QT interval.
What this interaction means in plain words
Chlorothiazide and Lofexidine 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.
Chlorothiazide belongs to Cardiovascular; Lofexidine belongs to Central Nervous System.
Why it happens
Additive hypotensive effect, with diuretic-related electrolyte loss that may potentiate QT prolongation.
What to do
Monitor blood pressure, heart rate and serum potassium and magnesium. Correct electrolyte disturbances and adjust doses if symptomatic hypotension occurs.
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 Lofexidine
- Adagrasib + Lofexidine Major
- Alfuzosin + Lofexidine Major
- Amiodarone + Lofexidine Major
- Amisulpride + Lofexidine Major
- Anagrelide + Lofexidine Major
- Apomorphine + Lofexidine Major
Other interactions of Chlorothiazide
Frequently asked questions
Can I take Chlorothiazide with Lofexidine?
MediHelp rates the interaction as moderate. Chlorothiazide and Lofexidine 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. Both lower blood pressure, and lofexidine also slows the heart rate. Thiazide-related loss of potassium or magnesium may also add to arrhythmia risk because lofexidine can prolong the QT interval.
How serious is the interaction between Chlorothiazide and Lofexidine?
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 blood pressure, heart rate and serum potassium and magnesium. Correct electrolyte disturbances and adjust doses if symptomatic hypotension occurs.
What other medicines interact with Lofexidine?
MediHelp also lists interactions of Lofexidine with, for example, Adagrasib, Alfuzosin, Amiodarone. The full list is on the Lofexidine page.
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