Ondansetron and Lymphocyte count increased - a phase IV clinical study of FDA data

Summary:

Lymphocyte count increased is reported as a side effect among people who take Ondansetron (ondansetron), especially for people who are female, 60+ old, have been taking the drug for < 1 month also take Sodium Chloride, and have Transient ischaemic attack.

The phase IV clinical study analyzes which people have Lymphocyte count increased when taking Ondansetron. It is created by eHealthMe based on reports of 122,217 people who have side effects when taking Ondansetron from the FDA, and is updated regularly.

What is Ondansetron?

Ondansetron has active ingredients of ondansetron. It is often used in nausea. eHealthMe is studying from 122,739 Ondansetron users. Check the latest studies of Ondansetron.

What is Lymphocyte count increased?

Lymphocyte count increased is found to be associated with 473 drugs and 611 conditions by eHealthMe. Check the latest studies of Lymphocyte count increased.

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 Aug, 31, 2026

122,217 people reported to have side effects when taking Ondansetron.
Among them, 27 people (0.02%) have Lymphocyte count increased.

Could Ondansetron cause Lymphocyte count increased?

Among these 27 people:

How long have people been on Ondansetron when they have Lymphocyte count increased? *

What is the gender of people who have Lymphocyte count increased when taking Ondansetron? *

female: 59.26 %
male: 40.74 %

What is the age of people who have Lymphocyte count increased when taking Ondansetron? *

What are other drugs people take besides Ondansetron? *

What are other side effects people have besides Lymphocyte count increased? *

Red Blood Cell Count Decreased: 9 people, 33.33%
Haemoglobin Decreased: 8 people, 29.63%
Monocyte Count Increased: 7 people, 25.93%
Neutrophil Count Increased (excess than normal number of neutrophil a type of blood cell): 7 people, 25.93%
White Blood Cell Count Decreased: 7 people, 25.93%
Blood Alkaline Phosphatase Increased: 7 people, 25.93%
Blood Glucose Increased: 7 people, 25.93%
Diarrhea: 7 people, 25.93%
Haematocrit Decreased: 6 people, 22.22%
Fever: 6 people, 22.22%

What are the existing conditions these people have? *

Hypotension (abnormally low blood pressure): 3 people, 11.11%
Blood Creatinine Increased: 3 people, 11.11%
Fever: 3 people, 11.11%
Cytokine Release Syndrome (immediate complication occurring with the use of anti-t cell antibody infusions): 3 people, 11.11%
Chronic Lymphocytic Leukaemia (cancer in which the bone marrow makes too many lymphocytes (a type of white blood cell)): 3 people, 11.11%
Bone Pain: 3 people, 11.11%
Multiple Myeloma (cancer of the plasma cells): 3 people, 11.11%
Blood Fibrinogen Decreased: 3 people, 11.11%
Stroke (sudden death of a portion of the brain cells due to a lack of oxygen): 3 people, 11.11%
Transient Ischaemic Attack (a transient episode of neurologic dysfunction caused by ischemia (loss of blood flow)): 3 people, 11.11%

* Approximation only. Some reports may have incomplete information.

Do you take Ondansetron and have Lymphocyte count increased?

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Related studies:

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

Ondansetron (122,739 reports)

Browse all side effects of Ondansetron:

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 Lymphocyte count increased:

Lymphocyte count increased (473 drugs)

Browse all the conditions that are associated with Lymphocyte count increased:

Lymphocyte count increased (611 conditions)

How the study uses the data?

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