Drug interactions
Ethosuximide + Istradefylline
Severity: Minor
Ethosuximide and Istradefylline: 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
Istradefylline at higher doses (40 mg/day) weakly inhibits CYP3A4 and can increase exposure to CYP3A4 substrates. Ethosuximide exposure may rise modestly, increasing sedation or gastrointestinal effects.
What this interaction means in plain words
Ethosuximide and Istradefylline have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Ethosuximide belongs to Central Nervous System; Istradefylline belongs to Central Nervous System.
Why it happens
Dose-dependent CYP3A4 inhibition by istradefylline reducing ethosuximide clearance.
What to do
Monitor for ethosuximide toxicity if istradefylline is used at 40 mg/day, and consider ethosuximide dose reduction if adverse effects occur.
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
Other interactions of Istradefylline
Frequently asked questions
Can I take Ethosuximide with Istradefylline?
MediHelp rates the interaction as minor. Ethosuximide and Istradefylline have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Istradefylline at higher doses (40 mg/day) weakly inhibits CYP3A4 and can increase exposure to CYP3A4 substrates. Ethosuximide exposure may rise modestly, increasing sedation or gastrointestinal effects.
How serious is the interaction between Ethosuximide and Istradefylline?
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 toxicity if istradefylline is used at 40 mg/day, and consider ethosuximide dose reduction if adverse effects occur.
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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