Drug interactions
Cholestyramine + Deferasirox
Severity: Major
Cholestyramine and Deferasirox: 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
Cholestyramine lowers deferasirox exposure, which may reduce iron chelation efficacy and allow iron overload to progress.
What this interaction means in plain words
Cholestyramine and Deferasirox 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.
Cholestyramine belongs to Cardiovascular; Deferasirox belongs to Miscellaneous.
Why it happens
Cholestyramine likely binds deferasirox and interrupts its enterohepatic recirculation, lowering systemic exposure.
What to do
Avoid the combination where possible. If it is required, monitor serum ferritin and clinical response and adjust the deferasirox dose accordingly.
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 Cholestyramine
Other interactions of Deferasirox
Frequently asked questions
Can I take Cholestyramine with Deferasirox?
MediHelp rates the interaction as major. Cholestyramine and Deferasirox 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. Cholestyramine lowers deferasirox exposure, which may reduce iron chelation efficacy and allow iron overload to progress.
How serious is the interaction between Cholestyramine and Deferasirox?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination where possible. If it is required, monitor serum ferritin and clinical response and adjust the deferasirox dose accordingly.
What other medicines interact with Cholestyramine?
MediHelp also lists interactions of Cholestyramine with, for example, Cholic acid, Leflunomide, Levothyroxine. The full list is on the Cholestyramine page.
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