Drug interactions
Quinine + Vorinostat
Severity: Major
Quinine and Vorinostat: 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
Both drugs can prolong the QT interval. Combined use raises the risk of torsades de pointes, especially with electrolyte abnormalities.
What this interaction means in plain words
Quinine and Vorinostat 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.
Quinine belongs to Anti Parasitic; Vorinostat belongs to Oncology.
Why it happens
Additive pharmacodynamic QT prolongation.
What to do
Obtain baseline and follow-up ECGs and keep potassium and magnesium normal. Consider an alternative to one of the agents if the QTc lengthens significantly.
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 Quinine
- Arsenic trioxide + Quinine Contraindicated
- Dofetilide + Quinine Contraindicated
- Dronedarone + Quinine Contraindicated
- Ibutilide + Quinine Contraindicated
- Mefloquine + Quinine Contraindicated
- Nilotinib + Quinine Contraindicated
Other interactions of Vorinostat
- Thioridazine + Vorinostat Contraindicated
- Amiodarone + Vorinostat Major
- Amisulpride + Vorinostat Major
- Anagrelide + Vorinostat Major
- Asenapine + Vorinostat Major
- Chlorpromazine + Vorinostat Major
Frequently asked questions
Can I take Quinine with Vorinostat?
MediHelp rates the interaction as major. Quinine and Vorinostat 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. Both drugs can prolong the QT interval. Combined use raises the risk of torsades de pointes, especially with electrolyte abnormalities.
How serious is the interaction between Quinine and Vorinostat?
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 baseline and follow-up ECGs and keep potassium and magnesium normal. Consider an alternative to one of the agents if the QTc lengthens significantly.
What other medicines interact with Quinine?
MediHelp also lists interactions of Quinine with, for example, Arsenic trioxide, Dofetilide, Dronedarone. The full list is on the Quinine page.
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