Pyridium and Haemoglobin decreased - a phase IV clinical study of FDA data

Summary:

Haemoglobin decreased is reported as a side effect among people who take Pyridium (phenazopyridine hydrochloride), especially for people who are female, 60+ old, have been taking the drug for 6 - 12 months also take Lasix, and have Osteoporosis.

The phase IV clinical study analyzes which people have Haemoglobin decreased when taking Pyridium. It is created by eHealthMe based on reports of 1,694 people who have side effects when taking Pyridium from the FDA, and is updated regularly.

What is Pyridium?

Pyridium has active ingredients of phenazopyridine hydrochloride. It is often used in urinary tract infection. eHealthMe is studying from 1,841 Pyridium users. Check the latest studies of Pyridium.

What is Haemoglobin decreased?

Haemoglobin decreased is found to be associated with 2,408 drugs and 3,128 conditions by eHealthMe. Check the latest studies of Haemoglobin decreased.

On Jul, 09, 2026

1,694 people reported to have side effects when taking Pyridium.
Among them, 25 people (1.48%) have Haemoglobin decreased.

Could Pyridium cause Haemoglobin decreased?

Among these 25 people:

How long have people been on Pyridium when they have Haemoglobin decreased? *

What is the gender of people who have Haemoglobin decreased when taking Pyridium? *

female: 83.33 %
male: 16.67 %

What is the age of people who have Haemoglobin decreased when taking Pyridium? *

What are other drugs people take besides Pyridium? *

What are other side effects people have besides Haemoglobin decreased? *

Hypotension (abnormally low blood pressure): 8 people, 32.00%
Pulmonary Oedema (fluid accumulation in the lungs): 8 people, 32.00%
Respiratory Acidosis (respiratory failure or ventilatory failure, causes the ph of blood and other bodily fluids to decrease): 8 people, 32.00%
Sepsis (a severe blood infection that can lead to organ failure and death): 7 people, 28.00%
Oxygen Saturation Decreased: 7 people, 28.00%
Pleural Effusion (water on the lungs): 7 people, 28.00%
Acute Kidney Failure: 7 people, 28.00%
Cardiac Aneurysm (a condition that can occur after a myocardial infarction due to the inadequate resistance of the new scar tissue to the systolic pressure): 6 people, 24.00%
Enlarged Heart: 6 people, 24.00%
Drug Exposure During Pregnancy: 6 people, 24.00%

What are the existing conditions these people have? *

Pain: 3 people, 12.00%
Osteoporosis (bones weak and more likely to break): 3 people, 12.00%
Breast Cancer: 2 people, 8.00%
Nausea (feeling of having an urge to vomit): 2 people, 8.00%
Stress And Anxiety: 1 person, 4.00%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 1 person, 4.00%
Blood Pressure Abnormal: 1 person, 4.00%
Breast Cancer Metastatic: 1 person, 4.00%
Cancer Pain: 1 person, 4.00%
Cervix Carcinoma Recurrent (repeated cancer of cervix): 1 person, 4.00%

* Approximation only. Some reports may have incomplete information.

Do you take Pyridium and have Haemoglobin decreased?

- Check whether Haemoglobin decreased 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 Pyridium:

Pyridium (1,841 reports)

Browse all side effects of Pyridium:

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 Haemoglobin decreased:

Haemoglobin decreased (2,408 drugs)

Browse all the conditions that are associated with Haemoglobin decreased:

Haemoglobin decreased (3,128 conditions)

How the study uses the data?

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