Viagra and Obstruction - a phase IV clinical study of FDA data

Summary:

Obstruction is reported as a side effect among people who take Viagra (sildenafil citrate), especially for people who are male, 60+ old, have been taking the drug for 6 - 12 months also take Zofran, and have Diarrhea.

The phase IV clinical study analyzes which people have Obstruction when taking Viagra. It is created by eHealthMe based on reports of 61,803 people who have side effects when taking Viagra from the FDA, and is updated regularly.

What is Viagra?

Viagra has active ingredients of sildenafil citrate. It is often used in erection problems. eHealthMe is studying from 63,865 Viagra users. Check the latest studies of Viagra.

What is Obstruction?

Obstruction is found to be associated with 468 drugs and 648 conditions by eHealthMe. Check the latest studies of Obstruction.

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, 03, 2026

61,803 people reported to have side effects when taking Viagra.
Among them, 14 people (0.02%) have Obstruction.

Among these 14 people:

How long have people been on Viagra when they have Obstruction? *

What is the gender of people who have Obstruction when taking Viagra? *

female: 0.0 %
male: 100 %

What is the age of people who have Obstruction when taking Viagra? *

What are other drugs people take besides Viagra? *

What are other side effects people have besides Obstruction? *

Diarrhea: 4 people, 28.57%
Chest Pain: 4 people, 28.57%
Weakness: 3 people, 21.43%
Hypophosphataemia (electrolyte disturbance in which there is an abnormally low level of phosphate in the blood): 3 people, 21.43%
Chronic Kidney Disease: 3 people, 21.43%
Lower Urinary Tract Symptoms: 3 people, 21.43%
Latent Tuberculosis (hidden tuberculosis): 3 people, 21.43%
Dry Eyes (lack of adequate tears): 3 people, 21.43%
Dyspnea (difficult or laboured breathing): 3 people, 21.43%
Dyspnea Exertional: 3 people, 21.43%

What are the existing conditions these people have? *

Pain: 3 people, 21.43%
Nausea (feeling of having an urge to vomit): 3 people, 21.43%
Multiple Myeloma (cancer of the plasma cells): 3 people, 21.43%
Irritability: 3 people, 21.43%
Diarrhea: 3 people, 21.43%
Platelet Count Abnormal: 2 people, 14.29%
Short-Bowel Syndrome (a condition in which the body cannot absorb enough fluids and nutrients because part of the small intestine is missing): 1 person, 7.14%
Ill-Defined Disorder: 1 person, 7.14%
High Blood Pressure: 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 Viagra and have Obstruction?

- Check whether Obstruction 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 Viagra:

Viagra (63,865 reports)

Obstruction treatments and more:

Obstruction (4,654 reports)

Browse all side effects of Viagra:

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 Obstruction:

Obstruction (468 drugs)

Browse all the conditions that are associated with Obstruction:

Obstruction (648 conditions)

Related publications that referenced our studies

Jeong SY, Jeon SJ, Kim YR, Choi SS, Kwak HS, "A Rare Case of Viagra Induced Toxic Encephalopathy", Investigative Magnetic Resonance Imaging, 2016 Sep .
Jeong SY, Jeon SJ, Kim YR, Choi SS, Kwak HS, "A Rare Case of Viagra Induced Toxic Encephalopathy", Investigative Magnetic Resonance Imaging, 2016 Sep .

How the study uses the data?

The study uses data from the FDA. It is based on sildenafil citrate (the active ingredients of Viagra) and Viagra (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.