Drug interactions
Calcifediol + Cholestyramine
Severity: Moderate
Calcifediol and Cholestyramine: 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
Cholestyramine can bind fat-soluble vitamin D compounds and reduce bile acid-dependent absorption of calcifediol. This can lower vitamin D status and affect calcium and PTH control.
What this interaction means in plain words
Calcifediol and Cholestyramine 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.
Calcifediol belongs to Musculoskeletal; Cholestyramine belongs to Cardiovascular.
Why it happens
Binding in the gut and interference with bile acid-dependent absorption of the fat-soluble vitamin.
What to do
Separate calcifediol from cholestyramine by several hours and monitor 25-hydroxyvitamin D, PTH and calcium, adjusting the dose when cholestyramine is started or stopped.
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 Cholestyramine
Other interactions of Calcifediol
- Amlodipine-hydrochlorothiazide-valsartan + Calcifediol Moderate
- Amlodipine-olmesartan-hydrochlorothiazide + Calcifediol Moderate
- Amobarbital + Calcifediol Moderate
- Atenolol-chlorthalidone + Calcifediol Moderate
- Azilsartan-chlorthalidone + Calcifediol Moderate
- Calcifediol + Candesartan-hydrochlorothiazide Moderate
Frequently asked questions
Can I take Calcifediol with Cholestyramine?
MediHelp rates the interaction as moderate. Calcifediol and Cholestyramine 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. Cholestyramine can bind fat-soluble vitamin D compounds and reduce bile acid-dependent absorption of calcifediol. This can lower vitamin D status and affect calcium and PTH control.
How serious is the interaction between Calcifediol and Cholestyramine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Separate calcifediol from cholestyramine by several hours and monitor 25-hydroxyvitamin D, PTH and calcium, adjusting the dose when cholestyramine is started or stopped.
What other medicines interact with Cholestyramine?
MediHelp also lists interactions of Cholestyramine with, for example, Cholic acid, Deferasirox, Leflunomide. The full list is on the Cholestyramine page.
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