Drug interactions
Lofexidine + Methyclothiazide
Severity: Moderate
Lofexidine and Methyclothiazide: 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
Methyclothiazide is a thiazide diuretic that lowers blood pressure, and lofexidine further reduces blood pressure and heart rate. Together they may cause hypotension and dizziness, and thiazide-related hypokalemia may add to arrhythmic risk given lofexidine's QT effect.
What this interaction means in plain words
Lofexidine and Methyclothiazide 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.
Why it happens
Additive hypotensive effect from diuretic volume reduction and central sympatholysis.
What to do
Monitor blood pressure, heart rate and serum potassium and magnesium. Adjust doses if symptomatic hypotension occurs and correct electrolyte disturbances.
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
Frequently asked questions
Can I take Lofexidine with Methyclothiazide?
MediHelp rates the interaction as moderate. Lofexidine and Methyclothiazide 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. Methyclothiazide is a thiazide diuretic that lowers blood pressure, and lofexidine further reduces blood pressure and heart rate. Together they may cause hypotension and dizziness, and thiazide-related hypokalemia may add to arrhythmic risk given lofexidine's QT effect.
How serious is the interaction between Lofexidine and Methyclothiazide?
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. Adjust doses if symptomatic hypotension occurs and correct electrolyte disturbances.
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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