Questran and Gallbladder operation - a phase IV clinical study of FDA data

Summary:

We study 8,995 people who take Questran (cholestyramine) or have Gallbladder operation. No report of Gallbladder operation is found in people who take Questran.

The phase IV clinical study is created by eHealthMe based on reports from the FDA, and is updated regularly.

What is Questran?

Questran has active ingredients of cholestyramine. It is often used in diarrhea. eHealthMe is studying from 4,490 Questran users. Check the latest studies of Questran.

What is Gallbladder Operation?

Gallbladder operation is found to be associated with 367 drugs and 759 conditions by eHealthMe. Check the latest studies of Gallbladder operation.

On Jan, 14, 2026

No report is found.

Do you take Questran and have Gallbladder operation?

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Related studies:

Effectiveness of, long term effects of, and alternative drugs to Questran:

Questran (4,490 reports)

Browse all side effects of Questran:

a b c d e f g h i j k l m n o p q r s t u v w x y z

Browse all the drugs that are associated with Gallbladder operation:

Gallbladder operation

Browse all the conditions that are associated with Gallbladder operation:

Gallbladder operation

Drugs similar to Questran and Gallbladder operation :

Imodium side effect: Gallbladder operation

How the study uses the data?

The study uses data from the FDA. It is based on cholestyramine (the active ingredients of Questran) and Questran (the brand name). Other drugs that have the same active ingredients (e.g. generic drugs) are not considered. Dosage of drugs is not considered in the study.

How to use the study?

DO NOT STOP MEDICATIONS without first consulting your doctor. If there are any serious or long term adverse effects discovered in the study, discuss the study with your doctor to ensure that proper medication management will be in place if applicable.

Who is eHealthMe?

With medical big data and proven AI/ML algorithms, eHealthMe provides a platform for everyone to run phase IV clinical trials. We study millions of patients and 5,000 more each day. Results of our real-world drug study have been referenced on 800+ peer-reviewed medical publications, including The Lancet, Mayo Clinic Proceedings, and Nature. Our analysis results are available to researchers, health care professionals, patients (testimonials), and software developers (open API).

WARNING, DISCLAIMER, USE FOR PUBLICATION

WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on eHealthMe.com is for informational purposes only, and is not a substitute for medical advice, diagnosis, or treatment provided by a qualified healthcare provider. All information is observation-only. Our phase IV clinical studies alone cannot establish cause-effect relationship. Different individuals may respond to medication in different ways. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. The use of the eHealthMe site and its content is at your own risk.

If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date.