Zyrtec and Staphylococcal bacteraemia - a phase IV clinical study of FDA data

Summary:

Staphylococcal bacteraemia is reported as a side effect among people who take Zyrtec (cetirizine hydrochloride), especially for people who are female, 60+ old, have been taking the drug for < 1 month also take Ambien, and have Multiple myeloma.

The phase IV clinical study analyzes which people have Staphylococcal bacteraemia when taking Zyrtec. It is created by eHealthMe based on reports of 109,528 people who have side effects when taking Zyrtec from the FDA, and is updated regularly.

What is Zyrtec?

Zyrtec has active ingredients of cetirizine hydrochloride. It is often used in allergies. eHealthMe is studying from 114,619 Zyrtec users. Check the latest studies of Zyrtec.

What is Staphylococcal bacteraemia?

Staphylococcal bacteraemia (a bacterial infection of blood) is found to be associated with 610 drugs and 667 conditions by eHealthMe. Check the latest studies of Staphylococcal bacteraemia.

On Jul, 17, 2026

109,528 people reported to have side effects when taking Zyrtec.
Among them, 43 people (0.04%) have Staphylococcal bacteraemia.

Could Zyrtec cause Staphylococcal bacteraemia?

Among these 43 people:

How long have people been on Zyrtec when they have Staphylococcal bacteraemia? *

What is the gender of people who have Staphylococcal bacteraemia when taking Zyrtec? *

female: 73.17 %
male: 26.83 %

What is the age of people who have Staphylococcal bacteraemia when taking Zyrtec? *

What are other drugs people take besides Zyrtec? *

What are other side effects people have besides Staphylococcal bacteraemia? *

Osteomyelitis (infection of bone): 12 people, 27.91%
Endocarditis (inflammation in heart muscle): 11 people, 25.58%
Pain In Extremity: 11 people, 25.58%
Pneumonia: 10 people, 23.26%
Diarrhea: 10 people, 23.26%
Mucosal Inflammation (infection of mucous membrane): 9 people, 20.93%
Nausea And Vomiting: 9 people, 20.93%
Paraesthesia (sensation of tingling, tickling, prickling, pricking, or burning of a person's skin with no apparent long-term physical effect): 8 people, 18.60%
Pain: 8 people, 18.60%
Sinusitis (inflammation of sinus): 8 people, 18.60%

What are the existing conditions these people have? *

Multiple Myeloma (cancer of the plasma cells): 8 people, 18.60%
Neoplasm Malignant (cancer tumour): 7 people, 16.28%
Acute Myeloid Leukaemia (acute cancer in which the bone marrow makes abnormal myeloblasts): 5 people, 11.63%
Primary Pulmonary Hypertension (primary high blood pressure that affects the arteries in the lungs and the right side of your heart): 5 people, 11.63%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 3 people, 6.98%
Non-Hodgkin's Lymphoma (malignant (cancer) cells form in the lymph system): 3 people, 6.98%
Arthritis (form of joint disorder that involves inflammation of one or more joints): 2 people, 4.65%
Bronchitis (inflammation of the mucous membrane in the bronchial tubes): 2 people, 4.65%
High Blood Pressure: 2 people, 4.65%
Sinusitis (inflammation of sinus): 2 people, 4.65%

* Approximation only. Some reports may have incomplete information.

Do you take Zyrtec and have Staphylococcal bacteraemia?

- Check whether Staphylococcal bacteraemia 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 Zyrtec:

Zyrtec (114,619 reports)

Browse all side effects of Zyrtec:

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 Staphylococcal bacteraemia:

Staphylococcal bacteraemia (610 drugs)

Browse all the conditions that are associated with Staphylococcal bacteraemia:

Staphylococcal bacteraemia (667 conditions)

How the study uses the data?

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