Drug interactions
Indapamide + Tolvaptan
Severity: Major
Indapamide and Tolvaptan: major 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 increase water and sodium loss, and together may cause excessive volume depletion, hypotension and rapid changes in serum sodium. Overly fast sodium correction carries a risk of osmotic demyelination, and indapamide itself can cause hyponatremia.
What this interaction means in plain words
Indapamide and Tolvaptan can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Indapamide belongs to Cardiovascular; Tolvaptan belongs to Endocrine.
Why it happens
Additive diuretic effects: tolvaptan causes aquaresis through V2 receptor blockade while indapamide causes natriuresis.
What to do
Monitor serum sodium frequently, particularly during the first 24 to 48 hours of tolvaptan, and watch volume status and blood pressure. Consider holding indapamide during initiation.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Indapamide
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 Indapamide with Tolvaptan?
MediHelp rates the interaction as major. Indapamide and Tolvaptan can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Both drugs increase water and sodium loss, and together may cause excessive volume depletion, hypotension and rapid changes in serum sodium. Overly fast sodium correction carries a risk of osmotic demyelination, and indapamide itself can cause hyponatremia.
How serious is the interaction between Indapamide and Tolvaptan?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor serum sodium frequently, particularly during the first 24 to 48 hours of tolvaptan, and watch volume status and blood pressure. Consider holding indapamide during initiation.
What other medicines interact with Indapamide?
MediHelp also lists interactions of Indapamide with, for example, Adagrasib, Amifostine, Amiodarone. The full list is on the Indapamide page.
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