Flexeril and White blood cell count abnormal - a phase IV clinical study of FDA data

Summary:

White blood cell count abnormal is reported as a side effect among people who take Flexeril (cyclobenzaprine hydrochloride), especially for people who are female, 50-59 old, also take Ativan, and have Neuropathy peripheral.

The phase IV clinical study analyzes which people have White blood cell count abnormal when taking Flexeril. It is created by eHealthMe based on reports of 34,789 people who have side effects when taking Flexeril from the FDA, and is updated regularly.

What is Flexeril?

Flexeril has active ingredients of cyclobenzaprine hydrochloride. It is often used in muscle spasms. eHealthMe is studying from 38,308 Flexeril users. Check the latest studies of Flexeril.

What is White blood cell count abnormal?

White blood cell count abnormal is found to be associated with 557 drugs and 840 conditions by eHealthMe. Check the latest studies of White blood cell count abnormal.

On Jul, 19, 2026

34,789 people reported to have side effects when taking Flexeril.
Among them, 39 people (0.11%) have White blood cell count abnormal.

Could Flexeril cause White blood cell count abnormal?

Among these 39 people:

What is the gender of people who have White blood cell count abnormal when taking Flexeril? *

female: 59.38 %
male: 40.62 %

What is the age of people who have White blood cell count abnormal when taking Flexeril? *

What are other drugs people take besides Flexeril? *

What are other side effects people have besides White blood cell count abnormal? *

Pain: 22 people, 56.41%
Fever: 21 people, 53.85%
Pain In Extremity: 20 people, 51.28%
Rashes (redness): 20 people, 51.28%
Pneumonia: 19 people, 48.72%
Malaise (a feeling of general discomfort or uneasiness): 19 people, 48.72%
Nausea (feeling of having an urge to vomit): 19 people, 48.72%
Joint Pain: 18 people, 46.15%
Hepatomegaly (abnormal enlargement of the liver): 18 people, 46.15%
Oropharyngeal Pain: 18 people, 46.15%

What are the existing conditions these people have? *

Primary Myelofibrosis (primary disorder of the bone marrow): 13 people, 33.33%
Polycythaemia Vera (blood disorder in which the bone marrow makes too many red blood cells): 13 people, 33.33%
Pelvic Pain: 13 people, 33.33%
Bronchitis (inflammation of the mucous membrane in the bronchial tubes): 13 people, 33.33%
Neuropathy Peripheral (surface nerve damage): 13 people, 33.33%
Chronic Myeloid Leukaemia (long lasting type of cancer that starts in the blood-forming cells of the bone marrow and invades the blood): 6 people, 15.38%
Chronic Lymphocytic Leukaemia (cancer in which the bone marrow makes too many lymphocytes (a type of white blood cell)): 5 people, 12.82%
Stress And Anxiety: 3 people, 7.69%
Relapsing-Remitting Multiple Sclerosis (reoccurrence of an inflammatory disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged): 3 people, 7.69%
Asthma: 3 people, 7.69%

* Approximation only. Some reports may have incomplete information.

Do you take Flexeril and have White blood cell count abnormal?

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Related studies:

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

Flexeril (38,308 reports)

Browse all side effects of Flexeril:

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 White blood cell count abnormal:

White blood cell count abnormal (557 drugs)

Browse all the conditions that are associated with White blood cell count abnormal:

White blood cell count abnormal (840 conditions)

How the study uses the data?

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