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

Summary:

Drowsiness is reported as a side effect among people who take Phenazopyridine hcl tab (phenazopyridine hydrochloride), especially for people who are female, 40-49 old, also take Lexapro, and have Bipolar disorder.

The phase IV clinical study analyzes which people have Drowsiness when taking Phenazopyridine hcl tab. It is created by eHealthMe based on reports of 1,059 people who have side effects when taking Phenazopyridine hcl tab from the FDA, and is updated regularly.

What is Phenazopyridine hcl tab?

Phenazopyridine hcl tab has active ingredients of phenazopyridine hydrochloride. It is often used in urinary tract infection. eHealthMe is studying from 1,123 Phenazopyridine hcl tab users. Check the latest studies of Phenazopyridine hcl tab.

What is Drowsiness?

Drowsiness is found to be associated with 2,865 drugs and 4,797 conditions by eHealthMe. Check the latest studies of Drowsiness.

On Jul, 18, 2026

1,059 people reported to have side effects when taking Phenazopyridine hcl tab.
Among them, 19 people (1.79%) have Drowsiness.

Could Phenazopyridine hcl tab cause Drowsiness?

Among these 19 people:

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

female: 89.47 %
male: 10.53 %

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

What are other drugs people take besides Phenazopyridine hcl tab? *

What are other side effects people have besides Drowsiness? *

Drug Ineffective: 7 people, 36.84%
Memory Loss: 7 people, 36.84%
Weakness: 6 people, 31.58%
Weight Increased: 6 people, 31.58%
Stress And Anxiety: 6 people, 31.58%
Urinary Retention (the inability to completely or partially empty the bladder): 6 people, 31.58%
Nausea (feeling of having an urge to vomit): 6 people, 31.58%
Gait Disturbance: 5 people, 26.32%
Oedema Peripheral (superficial swelling): 5 people, 26.32%
Depression: 5 people, 26.32%

What are the existing conditions these people have? *

Bipolar Disorder (mood disorder): 4 people, 21.05%
Fibromyalgia (a long-term condition which causes pain all over the body): 3 people, 15.79%
Bipolar I Disorder (mood disorder that is characterized by at least one manic or mixed episode): 3 people, 15.79%
Pain: 2 people, 10.53%
Initial Insomnia (feeling of inadequate or poor-quality sleep): 2 people, 10.53%
Nausea (feeling of having an urge to vomit): 2 people, 10.53%
Neuropathy Peripheral (surface nerve damage): 2 people, 10.53%
Back Pain: 2 people, 10.53%
Relapsing-Remitting Multiple Sclerosis (reoccurrence of an inflammatory disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged): 2 people, 10.53%
Cough: 1 person, 5.26%

* Approximation only. Some reports may have incomplete information.

Do you take Phenazopyridine hcl tab and have Drowsiness?

- Check whether Drowsiness 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 tab:

Phenazopyridine hcl tab (1,123 reports)

Drowsiness treatments and more:

Drowsiness (269,040 reports)

Browse all side effects of Phenazopyridine hcl tab:

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 Drowsiness:

Drowsiness (2,865 drugs)

Browse all the conditions that are associated with Drowsiness:

Drowsiness (4,797 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 tab) and Phenazopyridine hcl tab (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.