Arzerra and Headache - a phase IV clinical study of FDA data

Summary:

Headache is reported as a side effect among people who take Arzerra (ofatumumab), especially for people who are female, 60+ old, have been taking the drug for < 1 month also take Tylenol, and have Chronic lymphocytic leukaemia.

The phase IV clinical study analyzes which people have Headache when taking Arzerra. It is created by eHealthMe based on reports of 1,041 people who have side effects when taking Arzerra from the FDA, and is updated regularly.

What is Arzerra?

Arzerra has active ingredients of ofatumumab. eHealthMe is studying from 1,042 Arzerra users. Check the latest studies of Arzerra.

What is Headache?

Headache (pain in head) is found to be associated with 3,748 drugs and 5,758 conditions by eHealthMe. Check the latest studies of Headache.

On Apr, 24, 2026

1,041 people reported to have side effects when taking Arzerra.
Among them, 14 people (1.34%) have Headache.

Among these 14 people:

How long have people been on Arzerra when they have Headache? *

What is the gender of people who have Headache when taking Arzerra? *

female: 63.64 %
male: 36.36 %

What is the age of people who have Headache when taking Arzerra? *

What are other drugs people take besides Arzerra? *

What are other side effects people have besides Headache? *

Chills (felling of cold): 4 people, 28.57%
Skin Blushing/flushing (a sudden reddening of the face, neck): 4 people, 28.57%
High Blood Pressure: 3 people, 21.43%
Dyspnea (difficult or laboured breathing): 3 people, 21.43%
Urticaria (rash of round, red welts on the skin that itch intensely): 3 people, 21.43%
Dizziness: 3 people, 21.43%
Cough: 3 people, 21.43%
Fever: 3 people, 21.43%
Throat Irritation: 3 people, 21.43%
Pain: 2 people, 14.29%

What are the existing conditions these people have? *

Chronic Lymphocytic Leukaemia (cancer in which the bone marrow makes too many lymphocytes (a type of white blood cell)): 9 people, 64.29%
Chills (felling of cold): 2 people, 14.29%
Waldenstrom's Macroglobulinaemia (cancer affects small lymphocytes (white blood cells)): 1 person, 7.14%
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): 1 person, 7.14%
Rashes (redness): 1 person, 7.14%
Polymyositis (inflammatory muscle disease that causes weakness of the skeletal muscles): 1 person, 7.14%
Pneumonia: 1 person, 7.14%
Chronic Lymphocytic Leukaemia Refractory (a cancer of blood cells lymphocytes that no longer responds favourably to treatment): 1 person, 7.14%
Chronic Inflammatory Demyelinating Polyradiculoneuropathy (long lasting infection of nerves outside brain and spinal cord): 1 person, 7.14%

* Approximation only. Some reports may have incomplete information.

Do you take Arzerra and have Headache?

- Check whether Headache 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 Arzerra:

Arzerra (1,042 reports)

Headache treatments and more:

Headache (756,638 reports)

Browse all side effects of Arzerra:

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 Headache:

Headache (3,748 drugs)

Browse all the conditions that are associated with Headache:

Headache (5,758 conditions)

How the study uses the data?

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