From the databaseWhat the row says.
Every entry follows the same shape: what is happening, the mechanism, and the recommendation.
Pair type
Timing Sensitive
Scope
Supplement × Prescription
Last verified
June 4, 2026
Timing SensitiveModerate evidence
What is happening. Cholestyramine can reduce absorption of fat-soluble vitamin E during long-term use.
Mechanism. Bile acid sequestration impairs fat-soluble vitamin absorption.
Recommendation. Separate vitamin E from cholestyramine and monitor for deficiency only when clinically indicated.
Stack Score
How it moves the number.
Effect on the composite score
If both Cholestyramine and Vitamin E are in the same stack, this pair applies −5 to your Stack Score (per scored timing-sensitive row).
The full algorithm, the clamping rules, and four worked stacks are at /methodology/stack-score.
SourcesSources, by evidence tier.
Every claim on this page is cited. PMIDs link straight to PubMed.
Reference material
1- 1DailyMed. Cholestyramine US prescribing information. 2026.Needs sourceNo link