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

Summary:

Weight increased is reported as a side effect among people who take Zaditor (ketotifen fumarate), especially for people who are female, 60+ old, have been taking the drug for 2 - 5 years also take Tylenol, and have Hypersensitivity.

The phase IV clinical study analyzes which people have Weight increased when taking Zaditor. It is created by eHealthMe based on reports of 4,423 people who have side effects when taking Zaditor from the FDA, and is updated regularly.

What is Zaditor?

Zaditor has active ingredients of ketotifen fumarate. It is often used in eye allergy. eHealthMe is studying from 4,448 Zaditor users. Check the latest studies of Zaditor.

What is Weight increased?

Weight increased is found to be associated with 2,901 drugs and 3,926 conditions by eHealthMe. Check the latest studies of Weight increased.

On Feb, 11, 2026

4,423 people reported to have side effects when taking Zaditor.
Among them, 24 people (0.54%) have Weight increased.

Among these 24 people:

How long have people been on Zaditor when they have Weight increased? *

What is the gender of people who have Weight increased when taking Zaditor? *

female: 63.16 %
male: 36.84 %

What is the age of people who have Weight increased when taking Zaditor? *

What are other drugs people take besides Zaditor? *

What are other side effects people have besides Weight increased? *

Dyspnea (difficult or laboured breathing): 9 people, 37.50%
Constipation: 8 people, 33.33%
Fatigue (feeling of tiredness): 7 people, 29.17%
Chest Pain: 7 people, 29.17%
Cough: 6 people, 25.00%
Acute Myocardial Infarction (acute heart attack): 5 people, 20.83%
Intervertebral Disc Disorder (spinal disc disorder): 5 people, 20.83%
Hyperglycemia (high blood sugar): 5 people, 20.83%
Cardiac Failure Congestive: 5 people, 20.83%
Headache (pain in head): 5 people, 20.83%

What are the existing conditions these people have? *

High Blood Pressure: 6 people, 25.00%
Hypersensitivity: 6 people, 25.00%
Gout (uric acid crystals building up in the body): 5 people, 20.83%
Diabetes: 5 people, 20.83%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 5 people, 20.83%
Glaucoma (increased fluid pressure in the eye with vision loss): 5 people, 20.83%
Erection Problems: 5 people, 20.83%
High Blood Cholesterol: 5 people, 20.83%
Infection: 5 people, 20.83%
Eye Swelling: 5 people, 20.83%

* Approximation only. Some reports may have incomplete information.

Do you take Zaditor 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 Zaditor:

Zaditor (4,448 reports)

Weight increased treatments and more:

Weight increased (279,365 reports)

Browse all side effects of Zaditor:

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 (2,901 drugs)

Browse all the conditions that are associated with Weight increased:

Weight increased (3,926 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on ketotifen fumarate (the active ingredients of Zaditor) and Zaditor (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.