Drug interactions
Chlorthalidone + Ketorolac intranasal
Severity: Moderate
Chlorthalidone and Ketorolac intranasal: 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
NSAIDs such as ketorolac can reduce the diuretic and antihypertensive effect of thiazide-type diuretics through renal prostaglandin inhibition. Together they can also increase the risk of kidney injury, particularly in volume-depleted or older patients. Short-term intranasal use carries lower systemic exposure but the risk remains.
What this interaction means in plain words
Chlorthalidone and Ketorolac intranasal 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
NSAID inhibition of renal prostaglandin synthesis causes sodium and water retention and reduced renal perfusion, opposing diuretic action and increasing nephrotoxicity risk.
What to do
Limit ketorolac to the shortest course, ensure adequate hydration, and monitor blood pressure and serum creatinine. Consider an alternative analgesic in patients with renal impairment or heart failure.
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 Chlorthalidone
Frequently asked questions
Can I take Chlorthalidone with Ketorolac intranasal?
MediHelp rates the interaction as moderate. Chlorthalidone and Ketorolac intranasal 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. NSAIDs such as ketorolac can reduce the diuretic and antihypertensive effect of thiazide-type diuretics through renal prostaglandin inhibition. Together they can also increase the risk of kidney injury, particularly in volume-depleted or older patients. Short-term intranasal use carries lower systemic exposure but the risk remains.
How serious is the interaction between Chlorthalidone and Ketorolac intranasal?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Limit ketorolac to the shortest course, ensure adequate hydration, and monitor blood pressure and serum creatinine. Consider an alternative analgesic in patients with renal impairment or heart failure.
What other medicines interact with Chlorthalidone?
MediHelp also lists interactions of Chlorthalidone with, for example, Amifostine, Atenolol-chlorthalidone, Candesartan-hydrochlorothiazide. The full list is on the Chlorthalidone page.
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