Drug interactions
Blinatumomab + Quinidine
Severity: Moderate
Blinatumomab and Quinidine: moderate 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
Blinatumomab starts a transient cytokine release that can suppress CYP450 enzymes. Quinidine has a narrow therapeutic index, so levels may rise early in treatment, increasing QT and arrhythmia risk.
What this interaction means in plain words
Blinatumomab and Quinidine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Blinatumomab belongs to Oncology; Quinidine belongs to Anti Parasitic.
Why it happens
Cytokine release transiently suppresses CYP450 activity, reducing quinidine metabolism.
What to do
Monitor quinidine levels and ECG during the first days of the first cycle and when restarting. Adjust quinidine dose as needed.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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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 Blinatumomab
- Blinatumomab + Carbamazepine Moderate
- Blinatumomab + Cyclosporin Moderate
- Blinatumomab + Ethosuximide Moderate
- Blinatumomab + Phenytoin Moderate
- Blinatumomab + Quinine Moderate
- Blinatumomab + Siponimod Moderate
Frequently asked questions
Can I take Blinatumomab with Quinidine?
MediHelp rates the interaction as moderate. Blinatumomab and Quinidine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Blinatumomab starts a transient cytokine release that can suppress CYP450 enzymes. Quinidine has a narrow therapeutic index, so levels may rise early in treatment, increasing QT and arrhythmia risk.
How serious is the interaction between Blinatumomab and Quinidine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor quinidine levels and ECG during the first days of the first cycle and when restarting. Adjust quinidine dose as needed.
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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