Aggrenox and Obs - a phase IV clinical study of FDA data


Obs is reported only by a few people who take Aggrenox.

The phase IV clinical study analyzes which people take Aggrenox and have Obs. It is created by eHealthMe based on reports of 7,115 people who have side effects while taking Aggrenox from the FDA, and is updated regularly.

Phase IV trials are used to detect adverse drug outcomes and monitor drug effectiveness in the real world. With medical big data and AI algorithms, eHealthMe is running millions of phase IV trials and makes the results available to the public. Our original studies have been referenced on 600+ medical publications including The Lancet, Mayo Clinic Proceedings, and Nature.

On Dec, 31, 2022

7,115 people reported to have side effects when taking Aggrenox.
Among them, 2 people (0.03%) have Obs.

What is Aggrenox?

Aggrenox has active ingredients of aspirin; dipyridamole. It is often used in stroke. eHealthMe is studying from 7,338 Aggrenox users for its effectiveness, alternative drugs and more.

What is Obs?

Obs is found to be associated with 210 drugs and 174 conditions by eHealthMe.

Number of Aggrenox and Obs reports submitted per year:

Could Aggrenox cause Obs?

Age of people who have Obs when taking Aggrenox *:

  • 0-1: 0.0 %
  • 2-9: 0.0 %
  • 10-19: 0.0 %
  • 20-29: 0.0 %
  • 30-39: 0.0 %
  • 40-49: 0.0 %
  • 50-59: 100 %
  • 60+: 0.0 %

Common side effects people have besides Obs *:

  1. Speech Disorder: 2 people, 100.00%
  2. Gallstones (stone formation by bile component): 2 people, 100.00%
  3. Acute Kidney Failure: 2 people, 100.00%
  4. Acute Respiratory Failure: 2 people, 100.00%
  5. Antiphospholipid Syndrome (disorder that manifests clinically as recurrent venous or arterial thrombosis and/or fetal loss): 2 people, 100.00%
  6. Arrhythmias (irregular heartbeat): 2 people, 100.00%
  7. Bleeding Disorders: 2 people, 100.00%
  8. Blindness Cortical: 2 people, 100.00%
  9. Bone Marrow Failure: 2 people, 100.00%
  10. Cardiac Failure: 2 people, 100.00%

Common conditions people have *:

  1. Vasculitis (inflammation of a blood vessel or blood vessels): 2 people, 100.00%
  2. Gout (uric acid crystals building up in the body): 2 people, 100.00%

* Approximation only. Some reports may have incomplete information.

Do you take Aggrenox and have Obs?

Check whether Obs is associated with a drug or a condition

How to use the study?

You can discuss the study with your doctor, to ensure that all drug risks and benefits are fully discussed and understood.

Related studies

How severe was Obs and when was it recovered:

Expand to all the drugs that have ingredients of aspirin; dipyridamole:

Alternative drugs to, pros and cons of Aggrenox:

Common Aggrenox side effects:

Browse all side effects of Aggrenox:

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

Obs treatments and more:

  • Obs (255 reports)

COVID vaccines that are related to Obs:

All the drugs that are associated with Obs:

  • Obs (210 drugs)

All the conditions that are associated with Obs:

  • Obs (174 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on aspirin; dipyridamole (the active ingredients of Aggrenox) and Aggrenox (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.

Who is eHealthMe?

With medical big data and proven AI 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 600+ 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: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on 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.

Recent studies on eHealthMe: