Is TUDCA Safe with Cholestyramine?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Separate administration of TUDCA and cholestyramine by at least 4–6 hours. Take TUDCA either 1 hour before or 4–6 hours after cholestyramine to minimize binding in the GI tract. Consult your provider if you are taking both for liver-related conditions.
Why this interaction occurs
Cholestyramine is a bile acid sequestrant that binds bile acids including TUDCA within the gastrointestinal lumen, preventing their absorption and enterohepatic recirculation. Concurrent administration can substantially reduce the bioavailability and therapeutic efficacy of TUDCA, negating its hepatoprotective and choleretic effects.
Evidence
Evidence level: moderate.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 9,520 reports mentioning Cholestyramine. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Cholestyramine + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
Related interactions
All TUDCA interactions → · All Cholestyramine interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.