Drug interactions
Chlorothiazide + Ketorolac
Severity: Moderate
Chlorothiazide and Ketorolac: 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
Ketorolac can reduce the diuretic and blood pressure lowering effects of chlorothiazide. The combination in volume-depleted patients also increases the risk of acute kidney injury.
What this interaction means in plain words
Chlorothiazide and Ketorolac 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.
Chlorothiazide belongs to Cardiovascular; Ketorolac belongs to Musculoskeletal.
Why it happens
NSAID inhibition of renal prostaglandins reduces renal blood flow and promotes sodium and water retention, opposing thiazide action.
What to do
Ensure adequate hydration and monitor renal function, blood pressure and diuretic response. Limit ketorolac to the shortest possible course.
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 Ketorolac
- Aceclofenac + Ketorolac Contraindicated
- Acemetacin + Ketorolac Contraindicated
- Acetylsalicylic acid + Ketorolac Contraindicated
- Apixaban + Ketorolac Contraindicated
- Argatroban + Ketorolac Contraindicated
- Aspirin / citric acid / sodium bicarbonate + Ketorolac Contraindicated
Other interactions of Chlorothiazide
Frequently asked questions
Can I take Chlorothiazide with Ketorolac?
MediHelp rates the interaction as moderate. Chlorothiazide and Ketorolac 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. Ketorolac can reduce the diuretic and blood pressure lowering effects of chlorothiazide. The combination in volume-depleted patients also increases the risk of acute kidney injury.
How serious is the interaction between Chlorothiazide and Ketorolac?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Ensure adequate hydration and monitor renal function, blood pressure and diuretic response. Limit ketorolac to the shortest possible course.
What other medicines interact with Ketorolac?
MediHelp also lists interactions of Ketorolac with, for example, Aceclofenac, Acemetacin, Acetylsalicylic acid. The full list is on the Ketorolac page.
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