Drug interactions
Nitazoxanide + Phenytoin
Severity: Minor
Nitazoxanide and Phenytoin: 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
Tizoxanide, the active metabolite of nitazoxanide, is highly protein bound and could theoretically displace other highly bound drugs such as phenytoin. No clinically significant interaction has been clearly shown.
What this interaction means in plain words
Nitazoxanide and Phenytoin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Nitazoxanide belongs to Anti Bacterial; Phenytoin belongs to Central Nervous System.
Why it happens
Theoretical competition for plasma protein binding.
What to do
No routine change is needed for a short nitazoxanide course. Monitor for phenytoin toxicity signs and check levels if symptoms arise.
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 Phenytoin
- Artemether / lumefantrine + Phenytoin Contraindicated
- Bictegravir + Phenytoin Contraindicated
- Cabotegravir + Phenytoin Contraindicated
- Doravirine + Phenytoin Contraindicated
- Elbasvir / grazoprevir + Phenytoin Contraindicated
- Elvitegravir / cobicistat / emtricitabine / tenofovir df + Phenytoin Contraindicated
Other interactions of Nitazoxanide
Frequently asked questions
Can I take Nitazoxanide with Phenytoin?
MediHelp rates the interaction as minor. Nitazoxanide and Phenytoin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Tizoxanide, the active metabolite of nitazoxanide, is highly protein bound and could theoretically displace other highly bound drugs such as phenytoin. No clinically significant interaction has been clearly shown.
How serious is the interaction between Nitazoxanide and Phenytoin?
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 routine change is needed for a short nitazoxanide course. Monitor for phenytoin toxicity signs and check levels if symptoms arise.
What other medicines interact with Phenytoin?
MediHelp also lists interactions of Phenytoin with, for example, Artemether / lumefantrine, Bictegravir, Cabotegravir. The full list is on the Phenytoin page.
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