Keflex and Pelvic venous thrombosis - a phase IV clinical study of FDA data


Pelvic venous thrombosis is reported only by a few people who take Keflex.

The phase IV clinical study analyzes which people take Keflex and have Pelvic venous thrombosis. It is created by eHealthMe based on reports of 13,830 people who have side effects while taking Keflex from the FDA, and is updated regularly.

Phase IV trials are used to detect adverse drug outcomes and monitor drug effectiveness in the real world. With medical big data and AI algorithms, eHealthMe is running millions of phase IV trials and makes the results available to the public. Our original studies have been referenced on 600+ medical publications including The Lancet, Mayo Clinic Proceedings, and Nature.

On Oct, 01, 2022

13,830 people reported to have side effects when taking Keflex.
Among them, 5 people (0.04%) have Pelvic venous thrombosis.

What is Keflex?

Keflex has active ingredients of cephalexin. It is often used in infection. eHealthMe is studying from 14,739 Keflex users for its effectiveness, alternative drugs and more.

What is Pelvic venous thrombosis?

Pelvic venous thrombosis (blood clot occurring inside a blood vessel and thromboses (dvts) that form in the deep veins of the legs or in the pelvic veins) is found to be associated with 530 drugs and 327 conditions by eHealthMe.

Number of Keflex and Pelvic venous thrombosis reports submitted per year:

Could Keflex cause Pelvic venous thrombosis?

Age of people who have Pelvic venous thrombosis when taking Keflex *:

  • 0-1: 0.0 %
  • 2-9: 0.0 %
  • 10-19: 0.0 %
  • 20-29: 40 %
  • 30-39: 40 %
  • 40-49: 20 %
  • 50-59: 0.0 %
  • 60+: 0.0 %

Common drugs people take besides Keflex *:

  1. Yaz: 2 people, 40.00%
  2. Yasmin: 2 people, 40.00%
  3. Amoxicillin: 1 person, 20.00%
  4. Benazepril Hydrochloride: 1 person, 20.00%
  5. Carvedilol: 1 person, 20.00%
  6. Celebrex: 1 person, 20.00%
  7. Cephalexin: 1 person, 20.00%
  8. Ciprofloxacin Hydrochloride: 1 person, 20.00%
  9. Claritin: 1 person, 20.00%
  10. Dilantin: 1 person, 20.00%

Common side effects people have besides Pelvic venous thrombosis *:

  1. Deep Venous Thrombosis (blood clot in a major vein that usually develops in the legs and/or pelvis): 4 people, 80.00%
  2. Pulmonary Embolism (blockage of the main artery of the lung): 2 people, 40.00%
  3. Injury: 2 people, 40.00%
  4. Emotional Distress: 2 people, 40.00%
  5. Vena Cava Thrombosis (clotting of the blood in large vein carrying deoxygenated blood into the heart): 1 person, 20.00%
  6. Thrombophlebitis Superficial (swelling (inflammation) of a superficial vein caused by a blood clot): 1 person, 20.00%
  7. Stress And Anxiety: 1 person, 20.00%
  8. Pain: 1 person, 20.00%
  9. Oedema (fluid collection in tissue): 1 person, 20.00%
  10. Mobility Decreased (ability to move is reduced): 1 person, 20.00%

Common conditions people have *:

  1. Stress And Anxiety: 1 person, 20.00%
  2. Rashes (redness): 1 person, 20.00%
  3. Parkinson's Disease: 1 person, 20.00%
  4. Multiple Allergies (allergy to multiple agents): 1 person, 20.00%
  5. Hypotension (abnormally low blood pressure): 1 person, 20.00%
  6. Deep Venous Thrombosis (blood clot in a major vein that usually develops in the legs and/or pelvis): 1 person, 20.00%
  7. Convulsion (muscles contract and relax rapidly and repeatedly, resulting in an uncontrolled shaking of the body): 1 person, 20.00%
  8. Birth Control: 1 person, 20.00%

* Approximation only. Some reports may have incomplete information.

Do you take Keflex and have Pelvic venous thrombosis?

Check whether Pelvic venous thrombosis is associated with a drug or a condition

How to use the study?

You can discuss the study with your doctor, to ensure that all drug risks and benefits are fully discussed and understood.

Related publications that referenced our studies

Related studies

How severe was Pelvic venous thrombosis and when was it recovered:

Expand to all the drugs that have ingredients of cephalexin:

Alternative drugs to, pros and cons of Keflex:

Common Keflex side effects:

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

Pelvic venous thrombosis treatments and more:

COVID vaccines that are related to Pelvic venous thrombosis:

Common drugs associated with Pelvic venous thrombosis:

All the drugs that are associated with Pelvic venous thrombosis:

Common conditions associated with Pelvic venous thrombosis:

All the conditions that are associated with Pelvic venous thrombosis:

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.

Who is eHealthMe?

With medical big data and proven AI 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 600+ 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: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on 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.

Recent studies on eHealthMe: