Zithromax and Prothrombin time shortened - a phase IV clinical study of FDA data

Summary:

Prothrombin time shortened is reported as a side effect among people who take Zithromax (azithromycin), especially for people who are female, 40-49 old, have been taking the drug for < 1 month also take Ortho-Novum 7/7/7-21, and have Birth control.

The phase IV clinical study analyzes which people have Prothrombin time shortened when taking Zithromax. It is created by eHealthMe based on reports of 34,614 people who have side effects when taking Zithromax from the FDA, and is updated regularly.

What is Zithromax?

Zithromax has active ingredients of azithromycin. It is often used in sinusitis. eHealthMe is studying from 35,525 Zithromax users. Check the latest studies of Zithromax.

What is Prothrombin time shortened?

Prothrombin time shortened is found to be associated with 236 drugs and 536 conditions by eHealthMe. Check the latest studies of Prothrombin time shortened.

eHealthMe: drug outcomes in the real world

eHealthMe runs one of the largest post-marketing drug safety studies in the world. We study millions of patients and 5,000 more each day. Our data-driven phase IV clinical trials have been referenced on 800+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Tools to study our phase IV findings are available to the public, anonymous and free >>>.

On Sep, 03, 2026

34,614 people reported to have side effects when taking Zithromax.
Among them, 17 people (0.05%) have Prothrombin time shortened.

Could Zithromax cause Prothrombin time shortened?

Among these 17 people:

How long have people been on Zithromax when they have Prothrombin time shortened? *

What is the gender of people who have Prothrombin time shortened when taking Zithromax? *

female: 80 %
male: 20 %

What is the age of people who have Prothrombin time shortened when taking Zithromax? *

What are other drugs people take besides Zithromax? *

What are other side effects people have besides Prothrombin time shortened? *

International Normalised Ratio Decreased: 4 people, 23.53%
Weight Decreased: 3 people, 17.65%
Pulmonary Embolism (blockage of the main artery of the lung): 3 people, 17.65%
Upper Respiratory Tract Infection: 3 people, 17.65%
Liver Function Tests Nos Abnormal: 3 people, 17.65%
Joint Pain: 3 people, 17.65%
Atrial Tachycardia (rhythm disturbance that arises in the atria): 3 people, 17.65%
Chest Pain: 3 people, 17.65%
Pneumonia: 3 people, 17.65%
Heart Palpitations (feelings or sensations that your heart is pounding or racing): 3 people, 17.65%

What are the existing conditions these people have? *

Birth Control: 3 people, 17.65%
Pneumocystis Jiroveci Pneumonia (fungal infection of the lungs): 1 person, 5.88%
Mycobacterium Avium Complex Infection: 1 person, 5.88%
Ill-Defined Disorder: 1 person, 5.88%
Appetite - Decreased (decreased appetite occurs when you have a reduced desire to eat): 1 person, 5.88%

* Approximation only. Some reports may have incomplete information.

Do you take Zithromax and have Prothrombin time shortened?

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Related studies:

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

Zithromax (35,525 reports)

Browse all side effects of Zithromax:

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 Prothrombin time shortened:

Prothrombin time shortened (236 drugs)

Browse all the conditions that are associated with Prothrombin time shortened:

Prothrombin time shortened (536 conditions)

How the study uses the data?

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