Drug interactions
Methyclothiazide + Prednisone
Severity: Moderate
Methyclothiazide and Prednisone: 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 prednisone and thiazide diuretics promote potassium loss. Combined use can cause clinically relevant hypokalemia, which raises the risk of muscle weakness and arrhythmias, especially with digoxin or QT-prolonging drugs.
What this interaction means in plain words
Methyclothiazide and Prednisone 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 wasting from thiazide-induced distal sodium delivery and corticosteroid mineralocorticoid activity.
What to do
Monitor serum potassium and magnesium periodically, particularly early in therapy. Give potassium supplementation or a potassium-sparing agent if levels fall.
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 Prednisone
- Bcg vaccine live + Prednisone Contraindicated
- Measles vaccine + Prednisone Contraindicated
- Mifepristone + Prednisone Contraindicated
- Prednisone + Radium-223 dichloride Contraindicated
- Prednisone + Smallpox vaccine live Contraindicated
- Adenovirus types 4 and 7 live + Prednisone Major
Frequently asked questions
Can I take Methyclothiazide with Prednisone?
MediHelp rates the interaction as moderate. Methyclothiazide and Prednisone 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 prednisone and thiazide diuretics promote potassium loss. Combined use can cause clinically relevant hypokalemia, which raises the risk of muscle weakness and arrhythmias, especially with digoxin or QT-prolonging drugs.
How serious is the interaction between Methyclothiazide and Prednisone?
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, particularly early in therapy. Give potassium supplementation or a potassium-sparing agent if levels fall.
What other medicines interact with Prednisone?
MediHelp also lists interactions of Prednisone with, for example, Bcg vaccine live, Measles vaccine, Mifepristone. The full list is on the Prednisone page.
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