Drug interactions
Dexamethasone + Methyclothiazide
Severity: Moderate
Dexamethasone 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
Both drugs increase renal potassium loss, so combined use can produce additive hypokalemia. This raises arrhythmia risk, especially with digoxin or QT-prolonging drugs.
What this interaction means in plain words
Dexamethasone 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 kaliuresis from thiazide action and glucocorticoid mineralocorticoid effect.
What to do
Monitor serum potassium and magnesium periodically and replace as needed.
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 Dexamethasone
- Bcg vaccine live + Dexamethasone Contraindicated
- Dexamethasone + Mifepristone Contraindicated
- Dexamethasone + Rilpivirine Contraindicated
- Dexamethasone + Smallpox vaccine live Contraindicated
- Dexamethasone + Varicella virus vaccine live Contraindicated
- Dexamethasone + Yellow fever vaccine Contraindicated
Frequently asked questions
Can I take Dexamethasone with Methyclothiazide?
MediHelp rates the interaction as moderate. Dexamethasone 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. Both drugs increase renal potassium loss, so combined use can produce additive hypokalemia. This raises arrhythmia risk, especially with digoxin or QT-prolonging drugs.
How serious is the interaction between Dexamethasone 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 and magnesium periodically and replace as needed.
What other medicines interact with Dexamethasone?
MediHelp also lists interactions of Dexamethasone with, for example, Bcg vaccine live, Mifepristone, Rilpivirine. The full list is on the Dexamethasone page.
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