1. Home
  2. Analysis
  3. Acetaminophen
  4. Urethral-stenosis

Acetaminophen and Urethral stenosis - a phase IV clinical study of FDA data

Summary:

Urethral stenosis is reported as a side effect among people who take Acetaminophen (acetaminophen), especially for people who are 60+ old, also take Dilaudid, and have Insomnia.

The phase IV clinical study analyzes which people have Urethral stenosis when taking Acetaminophen. It is created by eHealthMe based on reports of 181,086 people who have side effects when taking Acetaminophen from the FDA, and is updated regularly.

What is Acetaminophen?

Acetaminophen has active ingredients of acetaminophen. It is often used in pain. eHealthMe is studying from 183,077 Acetaminophen users. Check the latest studies of Acetaminophen.

What is Urethral stenosis?

Urethral stenosis (narrowing of the urethra, may cause decreased urine output) is found to be associated with 251 drugs and 303 conditions by eHealthMe. Check the latest studies of Urethral stenosis.

On Jul, 16, 2026

181,086 people reported to have side effects when taking Acetaminophen.
Among them, 16 people (0.01%) have Urethral stenosis.

Could Acetaminophen cause Urethral stenosis?

Among these 16 people:

What is the age of people who have Urethral stenosis when taking Acetaminophen? *

  • 0-1: 0.0 %
  • 2-9: 0.0 %
  • 10-19: 0.0 %
  • 20-29: 0.0 %
  • 30-39: 9.09 %
  • 40-49: 0.0 %
  • 50-59: 9.09 %
  • 60+: 81.82 %

What are other drugs people take besides Acetaminophen? *

  1. Dilaudid: 6 people, 37.50%
  2. Zometa: 5 people, 31.25%
  3. Levothyroxine Sodium: 5 people, 31.25%
  4. Propofol: 5 people, 31.25%
  5. Hydrochlorothiazide: 5 people, 31.25%
  6. Sunitinib Malate: 5 people, 31.25%
  7. Magnesium Citrate: 5 people, 31.25%
  8. Synthroid: 5 people, 31.25%
  9. Fentanyl: 5 people, 31.25%
  10. Droperidol: 5 people, 31.25%

What are other side effects people have besides Urethral stenosis? *

  1. Constipation: 8 people, 50.00%
  2. Urinary Retention (the inability to completely or partially empty the bladder): 8 people, 50.00%
  3. Stress And Anxiety: 7 people, 43.75%
  4. Depression: 7 people, 43.75%
  5. Urination - Painful: 7 people, 43.75%
  6. Gait Disturbance: 7 people, 43.75%
  7. Tooth Abscess (pus formation in tooth): 6 people, 37.50%
  8. Coughing Up Blood: 6 people, 37.50%
  9. Oedema Peripheral (superficial swelling): 6 people, 37.50%
  10. Abdominal Pain: 6 people, 37.50%

What are the existing conditions these people have? *

  1. Fever: 5 people, 31.25%
  2. Insomnia (sleeplessness): 5 people, 31.25%
  3. Metastases To Bone (cancer spreads to bone): 4 people, 25.00%
  4. Urination - Painful: 3 people, 18.75%
  5. Hypoaesthesia (reduced sense of touch or sensation): 3 people, 18.75%
  6. Sleep Disorder: 3 people, 18.75%
  7. Affective Disorder (mental disorder): 3 people, 18.75%
  8. Prostatic Adenoma (prostatic non-cancerous tumour): 3 people, 18.75%
  9. Ankylosing Spondylitis (type of arthritis affecting the spine): 3 people, 18.75%
  10. Enlarged Prostate: 3 people, 18.75%

* Approximation only. Some reports may have incomplete information.

Do you take Acetaminophen and have Urethral stenosis?

- Check whether Urethral stenosis 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 Acetaminophen:

Urethral stenosis treatments and more:

How severe was Urethral stenosis and when was it recovered:

Expand to all the drugs that have ingredients of acetaminophen:

Sub-studies by age:

0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Browse all side effects of Acetaminophen:

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 Urethral stenosis:

Browse all the conditions that are associated with Urethral stenosis:

How the study uses the data?

The study uses data from the FDA. It is based on acetaminophen (the active ingredients of Acetaminophen) and Acetaminophen (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.

Recent studies on eHealthMe:

© 2026 eHealthMe.com. All rights reserved. Use of this site constitutes acceptance of eHealthMe.com's terms of service and privacy policy.