Drug interactions
Cyclopenthiazide + Tolmetin
Severity: Moderate
Cyclopenthiazide and Tolmetin: 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 can reduce the diuretic and antihypertensive effect of thiazides and may increase renal risk with volume depletion. Potassium effects oppose each other and are unpredictable.
What this interaction means in plain words
Cyclopenthiazide and Tolmetin 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 prostaglandins causes sodium and water retention and reduced renal perfusion, opposing thiazide action.
What to do
Monitor blood pressure, fluid status, renal function and electrolytes. Use the lowest effective NSAID dose for the shortest duration.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Cyclopenthiazide and Tolmetin, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Tolmetin
- Ketorolac intranasal + Tolmetin Contraindicated
- Ketorolac + Tolmetin Contraindicated
- Aceclofenac + Tolmetin Major
- Acemetacin + Tolmetin Major
- Alteplase + Tolmetin Major
- Amlodipine-hydrochlorothiazide-valsartan + Tolmetin Major
Frequently asked questions
Can I take Cyclopenthiazide with Tolmetin?
MediHelp rates the interaction as moderate. Cyclopenthiazide and Tolmetin 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 can reduce the diuretic and antihypertensive effect of thiazides and may increase renal risk with volume depletion. Potassium effects oppose each other and are unpredictable.
How serious is the interaction between Cyclopenthiazide and Tolmetin?
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 blood pressure, fluid status, renal function and electrolytes. Use the lowest effective NSAID dose for the shortest duration.
What other medicines interact with Tolmetin?
MediHelp also lists interactions of Tolmetin with, for example, Ketorolac intranasal, Ketorolac, Aceclofenac. The full list is on the Tolmetin page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
