Drug interactions
Gentamicin + Methyclothiazide
Severity: Moderate
Gentamicin 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
Thiazide diuretics lower serum potassium and magnesium, and gentamicin can cause renal potassium and magnesium wasting. Together they may deepen electrolyte depletion, raising arrhythmia risk. Diuretic-induced volume depletion may also increase aminoglycoside nephrotoxicity.
What this interaction means in plain words
Gentamicin 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 renal potassium and magnesium loss, plus diuretic-induced volume depletion that can raise aminoglycoside exposure and renal toxicity.
What to do
Monitor serum potassium, magnesium and renal function regularly, and replace electrolytes as needed. Keep the patient well hydrated and adjust gentamicin dosing using serum drug levels.
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 Gentamicin
- Cidofovir + Gentamicin Contraindicated
- Adefovir + Gentamicin Major
- Amikacin + Gentamicin Major
- Amlodipine-hydrochlorothiazide-valsartan + Gentamicin Major
- Amphotericin b deoxycholate + Gentamicin Major
- Amphotericin b + Gentamicin Major
Frequently asked questions
Can I take Gentamicin with Methyclothiazide?
MediHelp rates the interaction as moderate. Gentamicin 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. Thiazide diuretics lower serum potassium and magnesium, and gentamicin can cause renal potassium and magnesium wasting. Together they may deepen electrolyte depletion, raising arrhythmia risk. Diuretic-induced volume depletion may also increase aminoglycoside nephrotoxicity.
How serious is the interaction between Gentamicin 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 serum potassium, magnesium and renal function regularly, and replace electrolytes as needed. Keep the patient well hydrated and adjust gentamicin dosing using serum drug levels.
What other medicines interact with Gentamicin?
MediHelp also lists interactions of Gentamicin with, for example, Cidofovir, Adefovir, Amikacin. The full list is on the Gentamicin page.
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