Drug interactions
Ethosuximide + Nafcillin
Severity: Minor
Ethosuximide and Nafcillin: 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
Nafcillin is a CYP3A4 inducer and may lower concentrations of CYP3A4 substrates. Ethosuximide levels could fall, risking reduced seizure control, though data are limited.
What this interaction means in plain words
Ethosuximide and Nafcillin 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
Possible CYP3A4 induction by nafcillin increasing ethosuximide metabolism.
What to do
Monitor seizure control during nafcillin therapy and check ethosuximide levels if control worsens.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Ethosuximide and Nafcillin, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
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 Ethosuximide with Nafcillin?
MediHelp rates the interaction as minor. Ethosuximide and Nafcillin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Nafcillin is a CYP3A4 inducer and may lower concentrations of CYP3A4 substrates. Ethosuximide levels could fall, risking reduced seizure control, though data are limited.
How serious is the interaction between Ethosuximide and Nafcillin?
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 seizure control during nafcillin therapy and check ethosuximide levels if control worsens.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
