Drug interactions
Parecoxib + Tolvaptan
Severity: Moderate
Parecoxib and Tolvaptan: 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 parecoxib can reduce renal potassium excretion and impair renal function, and tolvaptan may also raise potassium. Hyperkalemia is possible, especially with renal impairment, and NSAID-related fluid retention may counteract the treatment goal.
What this interaction means in plain words
Parecoxib and Tolvaptan 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-induced suppression of renal prostaglandins reduces potassium excretion, adding to potassium elevation from tolvaptan.
What to do
Monitor serum potassium and renal function, especially in patients with kidney disease. 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?
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Other interactions of Tolvaptan
- Atazanavir + Tolvaptan Contraindicated
- Ceritinib + Tolvaptan Contraindicated
- Cobicistat + Tolvaptan Contraindicated
- Conivaptan + Tolvaptan Contraindicated
- Darunavir + Tolvaptan Contraindicated
- Idelalisib + Tolvaptan Contraindicated
Frequently asked questions
Can I take Parecoxib with Tolvaptan?
MediHelp rates the interaction as moderate. Parecoxib and Tolvaptan 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 parecoxib can reduce renal potassium excretion and impair renal function, and tolvaptan may also raise potassium. Hyperkalemia is possible, especially with renal impairment, and NSAID-related fluid retention may counteract the treatment goal.
How serious is the interaction between Parecoxib and Tolvaptan?
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 renal function, especially in patients with kidney disease. Use the lowest effective NSAID dose for the shortest duration.
What other medicines interact with Tolvaptan?
MediHelp also lists interactions of Tolvaptan with, for example, Atazanavir, Ceritinib, Cobicistat. The full list is on the Tolvaptan page.
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