Drug interactions
Quinidine + Trofinetide
Severity: Minor
Quinidine and Trofinetide: 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
Trofinetide is a weak CYP3A4 inhibitor and could slightly raise quinidine concentrations. The effect is probably small but may matter because quinidine has a narrow therapeutic index.
What this interaction means in plain words
Quinidine and Trofinetide have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Quinidine belongs to Anti Parasitic; Trofinetide belongs to Central Nervous System.
Why it happens
Weak inhibition of CYP3A4 by trofinetide reduces the metabolism of quinidine.
What to do
Monitor ECG and QTc, and check quinidine levels if toxicity is suspected. Reduce the quinidine dose if concentrations are elevated.
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 Quinidine
- Adagrasib + Quinidine Contraindicated
- Arsenic trioxide + Quinidine Contraindicated
- Artemether / lumefantrine + Quinidine Contraindicated
- Chloroquine + Quinidine Contraindicated
- Dofetilide + Quinidine Contraindicated
- Dronedarone + Quinidine Contraindicated
Other interactions of Trofinetide
Frequently asked questions
Can I take Quinidine with Trofinetide?
MediHelp rates the interaction as minor. Quinidine and Trofinetide have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Trofinetide is a weak CYP3A4 inhibitor and could slightly raise quinidine concentrations. The effect is probably small but may matter because quinidine has a narrow therapeutic index.
How serious is the interaction between Quinidine and Trofinetide?
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 ECG and QTc, and check quinidine levels if toxicity is suspected. Reduce the quinidine dose if concentrations are elevated.
What other medicines interact with Quinidine?
MediHelp also lists interactions of Quinidine with, for example, Adagrasib, Arsenic trioxide, Artemether / lumefantrine. The full list is on the Quinidine page.
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