Questran and Sinusitis - a phase IV clinical study of FDA data

Summary:

Sinusitis is reported as a side effect among people who take Questran (cholestyramine), especially for people who are female, 50-59 old, have been taking the drug for 1 - 6 months also take Coumadin, and have Neoplasm malignant.

The phase IV clinical study analyzes which people have Sinusitis when taking Questran. It is created by eHealthMe based on reports of 4,400 people who have side effects when taking Questran 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 Sinusitis?

Sinusitis (inflammation of sinus) is found to be associated with 2,399 drugs and 2,727 conditions by eHealthMe. Check the latest studies of Sinusitis.

eHealthMe: drug outcomes in the real world

eHealthMe runs one of the largest post-marketing drug safety studies in the world. We study millions of patients and 5,000 more each day. Our data-driven phase IV clinical trials have been referenced on 800+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Tools to study our phase IV findings are available to the public, anonymous and free >>>.

On Sep, 03, 2026

4,400 people reported to have side effects when taking Questran.
Among them, 56 people (1.27%) have Sinusitis.

Among these 56 people:

How long have people been on Questran when they have Sinusitis? *

What is the gender of people who have Sinusitis when taking Questran? *

female: 80 %
male: 20 %

What is the age of people who have Sinusitis when taking Questran? *

What are other drugs people take besides Questran? *

What are other side effects people have besides Sinusitis? *

Headache (pain in head): 26 people, 46.43%
Hypotension (abnormally low blood pressure): 21 people, 37.50%
Pain: 21 people, 37.50%
Stress And Anxiety: 20 people, 35.71%
Back Pain: 20 people, 35.71%
Cough: 19 people, 33.93%
Discomfort: 19 people, 33.93%
Abdominal Pain Upper: 18 people, 32.14%
Vision Blurred: 18 people, 32.14%
Fall: 18 people, 32.14%

What are the existing conditions these people have? *

Neoplasm Malignant (cancer tumour): 17 people, 30.36%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 7 people, 12.50%
High Blood Pressure: 4 people, 7.14%
Atrial Fibrillation/flutter (atrial fibrillation and flutter are abnormal heart rhythms in which the atria, or upper chambers of the heart, are out of sync with the ventricles): 3 people, 5.36%
Migraine (headache): 3 people, 5.36%
Pain: 3 people, 5.36%
Osteoporosis (bones weak and more likely to break): 3 people, 5.36%
Hypersensitivity: 2 people, 3.57%
Gastric Ulcer (stomach ulcer): 2 people, 3.57%
Systemic Lupus Erythematosus (an autoimmune disease, which means the body's immune system mistakenly, attacks healthy tissue): 2 people, 3.57%

* Approximation only. Some reports may have incomplete information.

Do you take Questran and have Sinusitis?

- Check whether Sinusitis is associated with a drug or a condition
- Predict drug outcomes for up to one year with AI
- Get an AI agent to monitor your drugs continuously

Related studies:

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

Questran (4,490 reports)

Sinusitis treatments and more:

Sinusitis (153,485 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 Sinusitis:

Sinusitis (2,399 drugs)

Browse all the conditions that are associated with Sinusitis:

Sinusitis (2,727 conditions)

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.