Bactrim and Weight increased - a phase IV clinical study of FDA data

Summary:

Weight increased is reported as a side effect among people who take Bactrim (sulfamethoxazole; trimethoprim), especially for people who are female, 60+ old, have been taking the drug for < 1 month also take Prednisone, and have Multiple myeloma.

The phase IV clinical study analyzes which people have Weight increased when taking Bactrim. It is created by eHealthMe based on reports of 86,509 people who have side effects when taking Bactrim from the FDA, and is updated regularly.

What is Bactrim?

Bactrim has active ingredients of sulfamethoxazole; trimethoprim. It is often used in urinary tract infection. eHealthMe is studying from 89,117 Bactrim users. Check the latest studies of Bactrim.

What is Weight increased?

Weight increased is found to be associated with 2,893 drugs and 3,940 conditions by eHealthMe. Check the latest studies of Weight increased.

On Mar, 24, 2026

86,509 people reported to have side effects when taking Bactrim.
Among them, 972 people (1.12%) have Weight increased.

Among these 972 people:

* Approximation only. Some reports may have incomplete information.

Do you take Bactrim and have Weight increased?

- Check whether Weight increased 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 Bactrim:

Bactrim (89,117 reports)

Weight increased treatments and more:

Weight increased (279,365 reports)

How severe was Weight increased and when was it recovered:

Weight increased in Bactrim

Expand to all the drugs that have ingredients of sulfamethoxazole; trimethoprim:

Weight increased and drugs with ingredients of sulfamethoxazole; trimethoprim (4,398 reports)

Sub-studies by gender and age:

Female: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Male: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Browse all side effects of Bactrim:

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 Weight increased:

Weight increased (2,893 drugs)

Browse all the conditions that are associated with Weight increased:

Weight increased (3,940 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on sulfamethoxazole; trimethoprim (the active ingredients of Bactrim) and Bactrim (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.