Drug interactions
Conivaptan + Ethosuximide
Severity: Minor
Conivaptan and Ethosuximide: 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
Conivaptan is a CYP3A4 inhibitor that may increase ethosuximide concentrations. Conivaptan is used only short term intravenously, so the effect is limited in duration.
What this interaction means in plain words
Conivaptan and Ethosuximide have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Conivaptan inhibits CYP3A4, decreasing the metabolism of ethosuximide.
What to do
Monitor for ethosuximide adverse effects such as sedation and ataxia during conivaptan infusion. Reduce the dose if toxicity develops.
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 Ethosuximide
- Benzhydrocodone / acetaminophen + Ethosuximide Major
- Buprenorphine long-acting + Ethosuximide Major
- Buprenorphine subdermal implant + Ethosuximide Major
- Buprenorphine transdermal + Ethosuximide Major
- Calcium / magnesium / potassium / sodium oxybates + Ethosuximide Major
- Ethosuximide + Fentanyl intranasal Major
Frequently asked questions
Can I take Conivaptan with Ethosuximide?
MediHelp rates the interaction as minor. Conivaptan and Ethosuximide have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Conivaptan is a CYP3A4 inhibitor that may increase ethosuximide concentrations. Conivaptan is used only short term intravenously, so the effect is limited in duration.
How serious is the interaction between Conivaptan and Ethosuximide?
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 for ethosuximide adverse effects such as sedation and ataxia during conivaptan infusion. Reduce the dose if toxicity develops.
What other medicines interact with Ethosuximide?
MediHelp also lists interactions of Ethosuximide with, for example, Benzhydrocodone / acetaminophen, Buprenorphine long-acting, Buprenorphine subdermal implant. The full list is on the Ethosuximide page.
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