Allopurinol and Gallbladder enlargement - a phase IV clinical study of FDA data

Summary:

Gallbladder enlargement is reported as a side effect among people who take Allopurinol (allopurinol), especially for people who are male, 60+ old, have been taking the drug for 6 - 12 months also take Hydrochlorothiazide, and have High blood pressure.

The phase IV clinical study analyzes which people have Gallbladder enlargement when taking Allopurinol. It is created by eHealthMe based on reports of 188,106 people who have side effects when taking Allopurinol from the FDA, and is updated regularly.

What is Allopurinol?

Allopurinol has active ingredients of allopurinol. It is often used in gout. eHealthMe is studying from 190,861 Allopurinol users. Check the latest studies of Allopurinol.

What is Gallbladder enlargement?

Gallbladder enlargement is found to be associated with 279 drugs and 635 conditions by eHealthMe. Check the latest studies of Gallbladder enlargement.

On Apr, 18, 2026

188,106 people reported to have side effects when taking Allopurinol.
Among them, 18 people (0.01%) have Gallbladder enlargement.

Could Allopurinol cause Gallbladder enlargement?

Among these 18 people:

How long have people been on Allopurinol when they have Gallbladder enlargement? *

What is the gender of people who have Gallbladder enlargement when taking Allopurinol? *

female: 7.14 %
male: 92.86 %

What is the age of people who have Gallbladder enlargement when taking Allopurinol? *

What are other drugs people take besides Allopurinol? *

What are other side effects people have besides Gallbladder enlargement? *

Gallstones (stone formation by bile component): 7 people, 38.89%
Hepatic Steatosis (fatty liver disease): 4 people, 22.22%
Oedema Peripheral (superficial swelling): 4 people, 22.22%
Arrhythmias (irregular heartbeat): 3 people, 16.67%
Malaise (a feeling of general discomfort or uneasiness): 3 people, 16.67%
Pain In Extremity: 3 people, 16.67%
Appetite - Decreased (decreased appetite occurs when you have a reduced desire to eat): 3 people, 16.67%
High Blood Cholesterol: 3 people, 16.67%
Pleural Effusion (water on the lungs): 3 people, 16.67%
Hepatic Cyst: 2 people, 11.11%

What are the existing conditions these people have? *

High Blood Pressure: 8 people, 44.44%
High Blood Cholesterol: 2 people, 11.11%
Dry Eyes (lack of adequate tears): 2 people, 11.11%
Primary Myelofibrosis (primary disorder of the bone marrow): 2 people, 11.11%
Oral Herpes (viral infection of mouth): 2 people, 11.11%
Non-Hodgkin's Lymphoma (malignant (cancer) cells form in the lymph system): 2 people, 11.11%
Cardiac Failure: 2 people, 11.11%
Hypersensitivity: 2 people, 11.11%
Dyslipidaemia (abnormal amount of lipids): 2 people, 11.11%
Diabetes: 2 people, 11.11%

* Approximation only. Some reports may have incomplete information.

Do you take Allopurinol and have Gallbladder enlargement?

- Check whether Gallbladder enlargement 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 Allopurinol:

Allopurinol (190,861 reports)

Browse all side effects of Allopurinol:

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 enlargement:

Gallbladder enlargement (279 drugs)

Browse all the conditions that are associated with Gallbladder enlargement:

Gallbladder enlargement (635 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on allopurinol (the active ingredients of Allopurinol) and Allopurinol (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.