Phenazopyridine hcl and Polyneuropathy - a phase IV clinical study of FDA data

Summary:

Polyneuropathy is reported as a side effect among people who take Phenazopyridine hcl (phenazopyridine hydrochloride), especially for people who are female, 50-59 old, also take Levaquin, and have Neoplasm malignant.

The phase IV clinical study analyzes which people have Polyneuropathy when taking Phenazopyridine hcl. It is created by eHealthMe based on reports of 1,399 people who have side effects when taking Phenazopyridine hcl from the FDA, and is updated regularly.

What is Phenazopyridine hcl?

Phenazopyridine hcl has active ingredients of phenazopyridine hydrochloride. It is often used in urinary tract infection. eHealthMe is studying from 1,588 Phenazopyridine hcl users. Check the latest studies of Phenazopyridine hcl.

What is Polyneuropathy?

Polyneuropathy (neurological disorder that occurs when many peripheral nerves throughout the body malfunction simultaneously) is found to be associated with 905 drugs and 944 conditions by eHealthMe. Check the latest studies of Polyneuropathy.

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 Aug, 29, 2026

1,399 people reported to have side effects when taking Phenazopyridine hcl.
Among them, 13 people (0.93%) have Polyneuropathy.

Could Phenazopyridine hcl cause Polyneuropathy?

Among these 13 people:

What is the gender of people who have Polyneuropathy when taking Phenazopyridine hcl? *

female: 76.92 %
male: 23.08 %

What is the age of people who have Polyneuropathy when taking Phenazopyridine hcl? *

What are other drugs people take besides Phenazopyridine hcl? *

What are other side effects people have besides Polyneuropathy? *

Intervertebral Disc Protrusion (spinal disc protrusion): 10 people, 76.92%
Back Pain: 10 people, 76.92%
Stress And Anxiety: 10 people, 76.92%
Pain: 10 people, 76.92%
Bone Marrow Failure: 9 people, 69.23%
Broken Bone: 9 people, 69.23%
Compression Fracture (fracture due to pressure caused by injury): 9 people, 69.23%
Disability: 9 people, 69.23%
Pain In Jaw: 9 people, 69.23%
Hydrocephalus (water on the brain): 9 people, 69.23%

What are the existing conditions these people have? *

Neoplasm Malignant (cancer tumour): 6 people, 46.15%
Stress And Anxiety: 1 person, 7.69%
Impaired Gastric Emptying: 1 person, 7.69%
Depression: 1 person, 7.69%

* Approximation only. Some reports may have incomplete information.

Do you take Phenazopyridine hcl and have Polyneuropathy?

- Check whether Polyneuropathy 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 Phenazopyridine hcl:

Phenazopyridine hcl (1,588 reports)

Polyneuropathy treatments and more:

Polyneuropathy (17,901 reports)

Browse all side effects of Phenazopyridine hcl:

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 Polyneuropathy:

Polyneuropathy (905 drugs)

Browse all the conditions that are associated with Polyneuropathy:

Polyneuropathy (944 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on phenazopyridine hydrochloride (the active ingredients of Phenazopyridine hcl) and Phenazopyridine hcl (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.