Drug interactions
Fosamprenavir + Lacosamide
Severity: Minor
Fosamprenavir and Lacosamide: 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
Fosamprenavir, as amprenavir, inhibits CYP3A4, which is a minor route for lacosamide. A clinically significant rise in lacosamide levels is unlikely in most patients.
What this interaction means in plain words
Fosamprenavir and Lacosamide 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
CYP3A4 inhibition modestly reduces lacosamide clearance.
What to do
No empiric dose change is needed. Monitor for dizziness and ataxia, especially with organ impairment.
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 Lacosamide
- Lacosamide + Zuranolone Major
- Atazanavir + Lacosamide Moderate
- Carbamazepine + Lacosamide Moderate
- Cenobamate + Lacosamide Moderate
- Clarithromycin + Lacosamide Moderate
- Daridorexant + Lacosamide Moderate
Frequently asked questions
Can I take Fosamprenavir with Lacosamide?
MediHelp rates the interaction as minor. Fosamprenavir and Lacosamide have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Fosamprenavir, as amprenavir, inhibits CYP3A4, which is a minor route for lacosamide. A clinically significant rise in lacosamide levels is unlikely in most patients.
How serious is the interaction between Fosamprenavir and Lacosamide?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No empiric dose change is needed. Monitor for dizziness and ataxia, especially with organ impairment.
What other medicines interact with Lacosamide?
MediHelp also lists interactions of Lacosamide with, for example, Zuranolone, Atazanavir, Carbamazepine. The full list is on the Lacosamide page.
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