Drug interactions
Chlorthalidone + Prednisolone
Severity: Moderate
Chlorthalidone and Prednisolone: 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 promote urinary potassium loss, so combined use can lead to additive hypokalemia. Low potassium may cause weakness, arrhythmias and increased digitalis toxicity.
What this interaction means in plain words
Chlorthalidone and Prednisolone 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.
Chlorthalidone belongs to Cardiovascular; Prednisolone belongs to Endocrine.
Why it happens
Additive potassium wasting: mineralocorticoid activity of prednisolone plus thiazide-like diuretic increased distal sodium delivery.
What to do
Monitor serum potassium and magnesium periodically during combined 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 Prednisolone
- Bcg vaccine live + Prednisolone Contraindicated
- Measles mumps and rubella vaccine live + Prednisolone Contraindicated
- Measles mumps rubella and varicella vaccine live + Prednisolone Contraindicated
- Measles vaccine + Prednisolone Contraindicated
- Mifepristone + Prednisolone Contraindicated
- Prednisolone + Radium-223 dichloride Contraindicated
Other interactions of Chlorthalidone
Frequently asked questions
Can I take Chlorthalidone with Prednisolone?
MediHelp rates the interaction as moderate. Chlorthalidone and Prednisolone 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 promote urinary potassium loss, so combined use can lead to additive hypokalemia. Low potassium may cause weakness, arrhythmias and increased digitalis toxicity.
How serious is the interaction between Chlorthalidone and Prednisolone?
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 during combined therapy. Give potassium supplementation or a potassium-sparing agent if levels fall.
What other medicines interact with Prednisolone?
MediHelp also lists interactions of Prednisolone with, for example, Bcg vaccine live, Measles mumps and rubella vaccine live, Measles mumps rubella and varicella vaccine live. The full list is on the Prednisolone page.
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