Keflex and Vaginal bleeding between periods - a phase IV clinical study of FDA data

Summary:

Vaginal bleeding between periods is reported as a side effect among people who take Keflex (cephalexin), especially for people who are 30-39 old, have been taking the drug for < 1 month also take Ortho Evra, and have Birth control.

The phase IV clinical study analyzes which people have Vaginal bleeding between periods when taking Keflex. It is created by eHealthMe based on reports of 14,902 people who have side effects when taking Keflex from the FDA, and is updated regularly.

What is Keflex?

Keflex has active ingredients of cephalexin. It is often used in infection. eHealthMe is studying from 15,844 Keflex users. Check the latest studies of Keflex.

What is Vaginal bleeding between periods?

Vaginal bleeding between periods is found to be associated with 575 drugs and 1,468 conditions by eHealthMe. Check the latest studies of Vaginal bleeding between periods.

On Jul, 29, 2026

14,902 people reported to have side effects when taking Keflex.
Among them, 20 people (0.13%) have Vaginal bleeding between periods.

Could Keflex cause Vaginal bleeding between periods?

Among these 20 people:

How long have people been on Keflex when they have Vaginal bleeding between periods? *

What is the age of people who have Vaginal bleeding between periods when taking Keflex? *

What are other drugs people take besides Keflex? *

What are other side effects people have besides Vaginal bleeding between periods? *

Heavy Or Prolong Menstrual Bleeding: 2 people, 10.00%
Hypoaesthesia (reduced sense of touch or sensation): 2 people, 10.00%
Ovarian Cysts (fluid filled sacs of the ovary): 2 people, 10.00%
Mood Swings (an extreme or rapid change in mood): 2 people, 10.00%
Menstrual Disorder (disease of menstrual cycle): 2 people, 10.00%
Unintended Pregnancy (unwanted pregnancies as well as those that are mistimed): 2 people, 10.00%
Malaise (a feeling of general discomfort or uneasiness): 2 people, 10.00%
Weight Increased: 2 people, 10.00%
Vaginal Bleeding: 2 people, 10.00%
Vaginal Discharge: 2 people, 10.00%

What are the existing conditions these people have? *

Birth Control: 7 people, 35.00%
Stress And Anxiety: 1 person, 5.00%
Nausea (feeling of having an urge to vomit): 1 person, 5.00%
Nail Infection: 1 person, 5.00%
Cystitis Interstitial (unknown cause characterized by bladder pain): 1 person, 5.00%

* Approximation only. Some reports may have incomplete information.

Do you take Keflex and have Vaginal bleeding between periods?

- Check whether Vaginal bleeding between periods 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 Keflex:

Keflex (15,844 reports)

Browse all side effects of Keflex:

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 Vaginal bleeding between periods:

Vaginal bleeding between periods (575 drugs)

Browse all the conditions that are associated with Vaginal bleeding between periods:

Vaginal bleeding between periods (1,468 conditions)

Related publications that referenced our studies

Agrawal A, Rao M, Jasdanwala S, Mathur A, Eng M, "Cephalexin Induced Cholestatic Jaundice", Case reports in gastrointestinal medicine, 2014 Aug .
Agrawal A, Rao M, Jasdanwala S, Mathur A, Eng M, "Cephalexin Induced Cholestatic Jaundice", Case reports in gastrointestinal medicine, 2014 Aug .

How the study uses the data?

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