Drug interactions
Quinidine + Triptorelin
Severity: Major
Quinidine and Triptorelin: major 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
Triptorelin, as androgen deprivation therapy, can prolong the QT interval, and quinidine has a strong QT-prolonging effect. Combined use raises the risk of torsades de pointes.
What this interaction means in plain words
Quinidine and Triptorelin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Quinidine belongs to Anti Parasitic; Triptorelin belongs to Endocrine.
Why it happens
Additive QT prolongation, with androgen deprivation by triptorelin adding to quinidine's effect.
What to do
Obtain a baseline ECG and check electrolytes, then monitor the QTc periodically. Prefer a non-QT-prolonging antiarrhythmic where possible.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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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 Triptorelin
Frequently asked questions
Can I take Quinidine with Triptorelin?
MediHelp rates the interaction as major. Quinidine and Triptorelin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Triptorelin, as androgen deprivation therapy, can prolong the QT interval, and quinidine has a strong QT-prolonging effect. Combined use raises the risk of torsades de pointes.
How serious is the interaction between Quinidine and Triptorelin?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain a baseline ECG and check electrolytes, then monitor the QTc periodically. Prefer a non-QT-prolonging antiarrhythmic where possible.
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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