Flagyl and Red cell distribution width increased - a phase IV clinical study of FDA data

Summary:

Red cell distribution width increased is reported as a side effect among people who take Flagyl (metronidazole), especially for people who are female, 20-29 old, also take Tylenol, and have Pain.

The phase IV clinical study analyzes which people have Red cell distribution width increased when taking Flagyl. It is created by eHealthMe based on reports of 24,739 people who have side effects when taking Flagyl from the FDA, and is updated regularly.

What is Flagyl?

Flagyl has active ingredients of metronidazole. It is often used in vaginitis bacterial. eHealthMe is studying from 25,897 Flagyl users. Check the latest studies of Flagyl.

What is Red cell distribution width increased?

Red cell distribution width increased is found to be associated with 607 drugs and 653 conditions by eHealthMe. Check the latest studies of Red cell distribution width increased.

On Jun, 12, 2026

24,739 people reported to have side effects when taking Flagyl.
Among them, 20 people (0.08%) have Red cell distribution width increased.

Could Flagyl cause Red cell distribution width increased?

Among these 20 people:

What is the gender of people who have Red cell distribution width increased when taking Flagyl? *

female: 57.14 %
male: 42.86 %

What is the age of people who have Red cell distribution width increased when taking Flagyl? *

What are other drugs people take besides Flagyl? *

What are other side effects people have besides Red cell distribution width increased? *

Abdominal Pain: 15 people, 75.00%
Fever: 12 people, 60.00%
Constipation: 12 people, 60.00%
Nausea And Vomiting: 11 people, 55.00%
Nausea (feeling of having an urge to vomit): 11 people, 55.00%
Fatigue (feeling of tiredness): 11 people, 55.00%
Infection: 11 people, 55.00%
High Blood Pressure: 11 people, 55.00%
Abdominal Discomfort: 11 people, 55.00%
Heart Rate Increased: 10 people, 50.00%

What are the existing conditions these people have? *

Pain: 11 people, 55.00%
Ulcerative Colitis (inflammatory bowel disease (ibd). it causes swelling, ulcerations, and loss of function of the large intestine): 9 people, 45.00%
Nausea (feeling of having an urge to vomit): 9 people, 45.00%
Infection: 9 people, 45.00%
Fever: 9 people, 45.00%
Birth Control: 9 people, 45.00%
Abdominal Pain: 9 people, 45.00%
Pvt: 3 people, 15.00%
Paroxysmal Nocturnal Haemoglobinuria (haemoglobin in the urine): 3 people, 15.00%
Indigestion: 2 people, 10.00%

* Approximation only. Some reports may have incomplete information.

Do you take Flagyl and have Red cell distribution width increased?

- Check whether Red cell distribution width increased is associated with a drug or a condition
- Predict drug outcomes for up to one year with AI
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Related studies:

Effectiveness of, long term effects of, and alternative drugs to Flagyl:

Flagyl (25,897 reports)

Browse all side effects of Flagyl:

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 Red cell distribution width increased:

Red cell distribution width increased (607 drugs)

Browse all the conditions that are associated with Red cell distribution width increased:

Red cell distribution width increased (653 conditions)

How the study uses the data?

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