Oseltamivir phosphate and Sinusitis - a phase IV clinical study of FDA data

Summary:

Sinusitis is reported as a side effect among people who take Oseltamivir phosphate (oseltamivir phosphate), especially for people who are male, 50-59 old, also take Hydroxyzine Hydrochloride, and have Cataplexy.

The phase IV clinical study analyzes which people have Sinusitis when taking Oseltamivir phosphate. It is created by eHealthMe based on reports of 1,808 people who have side effects when taking Oseltamivir phosphate from the FDA, and is updated regularly.

What is Oseltamivir phosphate?

Oseltamivir phosphate has active ingredients of oseltamivir phosphate. eHealthMe is studying from 1,825 Oseltamivir phosphate users. Check the latest studies of Oseltamivir phosphate.

What is Sinusitis?

Sinusitis (inflammation of sinus) is found to be associated with 2,399 drugs and 2,727 conditions by eHealthMe. Check the latest studies of Sinusitis.

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 Jul, 27, 2026

1,808 people reported to have side effects when taking Oseltamivir phosphate.
Among them, 14 people (0.77%) have Sinusitis.

Could Oseltamivir phosphate cause Sinusitis?

Among these 14 people:

What is the gender of people who have Sinusitis when taking Oseltamivir phosphate? *

female: 42.86 %
male: 57.14 %

What is the age of people who have Sinusitis when taking Oseltamivir phosphate? *

What are other drugs people take besides Oseltamivir phosphate? *

Hydroxyzine Hydrochloride: 6 people, 42.86%
Meloxicam: 5 people, 35.71%
Epinephrine: 5 people, 35.71%
Vitamin D3: 5 people, 35.71%
Gabapentin: 5 people, 35.71%
Zyrtec: 4 people, 28.57%
Advil: 4 people, 28.57%
Protonix: 4 people, 28.57%
Sodium Chloride: 4 people, 28.57%
Albuterol Sulfate: 4 people, 28.57%

What are other side effects people have besides Sinusitis? *

Nausea (feeling of having an urge to vomit): 9 people, 64.29%
Cough: 7 people, 50.00%
Nausea And Vomiting: 7 people, 50.00%
The Flu (the flu is caused by an influenza virus): 7 people, 50.00%
Malaise (a feeling of general discomfort or uneasiness): 7 people, 50.00%
Headache (pain in head): 6 people, 42.86%
Back Pain: 6 people, 42.86%
Bronchitis (inflammation of the mucous membrane in the bronchial tubes): 6 people, 42.86%
Neck Pain: 6 people, 42.86%
Nasal Congestion (blockage of the nasal passages usually due to membranes lining the nose becoming swollen from inflamed blood vessels): 6 people, 42.86%

What are the existing conditions these people have? *

Post Procedural Diarrhea: 2 people, 14.29%
Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 2 people, 14.29%
Hiv Infection: 2 people, 14.29%
Cough: 2 people, 14.29%
Cataplexy (loss of muscle tone accompanied by full conscious awareness): 2 people, 14.29%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 1 person, 7.14%
Osteoporosis (bones weak and more likely to break): 1 person, 7.14%
Multiple Myeloma (cancer of the plasma cells): 1 person, 7.14%
Immunodeficiency Common Variable: 1 person, 7.14%
Crohn's Disease (a condition that causes inflammation of the gastrointestinal tract): 1 person, 7.14%

* Approximation only. Some reports may have incomplete information.

Do you take Oseltamivir phosphate and have Sinusitis?

- Check whether Sinusitis 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 Oseltamivir phosphate:

Oseltamivir phosphate (1,825 reports)

Sinusitis treatments and more:

Sinusitis (153,485 reports)

Browse all side effects of Oseltamivir phosphate:

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 Sinusitis:

Sinusitis (2,399 drugs)

Browse all the conditions that are associated with Sinusitis:

Sinusitis (2,727 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on oseltamivir phosphate (the active ingredients of Oseltamivir phosphate) and Oseltamivir phosphate (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.