Pataday and Eye allergy - a phase IV clinical study of FDA data

Summary:

Eye allergy is reported as a side effect among people who take Pataday (olopatadine hydrochloride), especially for people who are female, 40-49 old, have been taking the drug for < 1 month also take Xolair, and have Asthma.

The phase IV clinical study analyzes which people have Eye allergy when taking Pataday. It is created by eHealthMe based on reports of 8,221 people who have side effects when taking Pataday from the FDA, and is updated regularly.

What is Pataday?

Pataday has active ingredients of olopatadine hydrochloride. It is often used in allergies. eHealthMe is studying from 8,288 Pataday users. Check the latest studies of Pataday.

What is Eye allergy?

Eye allergy is found to be associated with 206 drugs and 284 conditions by eHealthMe. Check the latest studies of Eye allergy.

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, 01, 2026

8,221 people reported to have side effects when taking Pataday.
Among them, 25 people (0.3%) have Eye allergy.

Among these 25 people:

How long have people been on Pataday when they have Eye allergy? *

What is the gender of people who have Eye allergy when taking Pataday? *

female: 60 %
male: 40 %

What is the age of people who have Eye allergy when taking Pataday? *

What are other drugs people take besides Pataday? *

What are other side effects people have besides Eye allergy? *

Ocular Hyperaemia (an abnormally large amount of blood in eye): 6 people, 24.00%
Headache (pain in head): 6 people, 24.00%
Drug Ineffective: 6 people, 24.00%
Fatigue (feeling of tiredness): 5 people, 20.00%
Eye Pruritus (eye itching): 5 people, 20.00%
Eye Swelling: 4 people, 16.00%
Dry Skin: 4 people, 16.00%
Malaise (a feeling of general discomfort or uneasiness): 4 people, 16.00%
Tremor (trembling or shaking movements in one or more parts of your body): 4 people, 16.00%
Tinnitus (a ringing in the ears): 4 people, 16.00%

What are the existing conditions these people have? *

Asthma: 5 people, 20.00%
Hypersensitivity: 2 people, 8.00%
Osteoporosis (bones weak and more likely to break): 2 people, 8.00%
Allergic Rhinitis: 2 people, 8.00%
Osteopenia (a condition where bone mineral density is lower than normal): 1 person, 4.00%
Nosebleed (bleeding from nose): 1 person, 4.00%
Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 1 person, 4.00%
Migraine (headache): 1 person, 4.00%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 1 person, 4.00%
Skin Wrinkling (wrinkle on skin): 1 person, 4.00%

* Approximation only. Some reports may have incomplete information.

Do you take Pataday and have Eye allergy?

- Check whether Eye allergy 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 Pataday:

Pataday (8,288 reports)

Eye allergy treatments and more:

Eye allergy (3,635 reports)

Browse all side effects of Pataday:

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 Eye allergy:

Eye allergy (206 drugs)

Browse all the conditions that are associated with Eye allergy:

Eye allergy (284 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on olopatadine hydrochloride (the active ingredients of Pataday) and Pataday (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.