Drug interactions
Tolvaptan + Topiramate
Severity: Minor
Tolvaptan and Topiramate: minor 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
Topiramate could slightly lower tolvaptan exposure and so reduce its aquaretic effect. This is a theoretical, likely minor effect.
What this interaction means in plain words
Tolvaptan and Topiramate have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Tolvaptan belongs to Endocrine; Topiramate belongs to Central Nervous System.
Why it happens
Weak CYP3A4 induction by topiramate increasing tolvaptan clearance.
What to do
Monitor serum sodium and clinical response, and increase the tolvaptan dose within labeled limits if the effect is inadequate.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Topiramate
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 Tolvaptan with Topiramate?
MediHelp rates the interaction as minor. Tolvaptan and Topiramate have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Topiramate could slightly lower tolvaptan exposure and so reduce its aquaretic effect. This is a theoretical, likely minor effect.
How serious is the interaction between Tolvaptan and Topiramate?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor serum sodium and clinical response, and increase the tolvaptan dose within labeled limits if the effect is inadequate.
What other medicines interact with Topiramate?
MediHelp also lists interactions of Topiramate with, for example, Benzhydrocodone / acetaminophen, Buprenorphine long-acting, Buprenorphine subdermal implant. The full list is on the Topiramate page.
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