Astelin and Visual acuity reduced - a phase IV clinical study of FDA data

Summary:

Visual acuity reduced is reported as a side effect among people who take Astelin (azelastine hydrochloride), especially for people who are female, 60+ old, also take Singulair, and have Asthma.

The phase IV clinical study analyzes which people have Visual acuity reduced when taking Astelin. It is created by eHealthMe based on reports of 5,326 people who have side effects when taking Astelin from the FDA, and is updated regularly.

What is Astelin?

Astelin has active ingredients of azelastine hydrochloride. It is often used in allergies. eHealthMe is studying from 5,538 Astelin users. Check the latest studies of Astelin.

What is Visual acuity reduced?

Visual acuity reduced (reduced clearness of vision) is found to be associated with 1,492 drugs and 1,887 conditions by eHealthMe. Check the latest studies of Visual acuity reduced.

On Jul, 14, 2026

5,326 people reported to have side effects when taking Astelin.
Among them, 14 people (0.26%) have Visual acuity reduced.

Could Astelin cause Visual acuity reduced?

Among these 14 people:

What is the gender of people who have Visual acuity reduced when taking Astelin? *

female: 78.57 %
male: 21.43 %

What is the age of people who have Visual acuity reduced when taking Astelin? *

What are other drugs people take besides Astelin? *

What are other side effects people have besides Visual acuity reduced? *

Pain: 3 people, 21.43%
Weight Decreased: 3 people, 21.43%
Vision Blurred: 3 people, 21.43%
Swallowing Difficulty: 2 people, 14.29%
High Blood Pressure: 2 people, 14.29%
Hypoaesthesia (reduced sense of touch or sensation): 2 people, 14.29%
Hearing Impaired: 2 people, 14.29%
Speech Disorder: 2 people, 14.29%
Headache (pain in head): 2 people, 14.29%
Memory Loss: 2 people, 14.29%

What are the existing conditions these people have? *

High Blood Pressure: 3 people, 21.43%
Asthma: 3 people, 21.43%
Osteoporosis (bones weak and more likely to break): 2 people, 14.29%
Muscle Spasms (muscle contraction): 2 people, 14.29%
T-Cell Lymphoma (a blood cell cancer): 1 person, 7.14%
Systemic Lupus Erythematosus (an autoimmune disease, which means the body's immune system mistakenly, attacks healthy tissue): 1 person, 7.14%
Premenstrual Syndrome: 1 person, 7.14%
Pain: 1 person, 7.14%
Metastatic Malignant Melanoma (spreadable cancer tumour of melanine): 1 person, 7.14%
Menstruation Irregular: 1 person, 7.14%

* Approximation only. Some reports may have incomplete information.

Do you take Astelin and have Visual acuity reduced?

- Check whether Visual acuity reduced 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 Astelin:

Astelin (5,538 reports)

Browse all side effects of Astelin:

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 Visual acuity reduced:

Visual acuity reduced (1,492 drugs)

Browse all the conditions that are associated with Visual acuity reduced:

Visual acuity reduced (1,887 conditions)

How the study uses the data?

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