Hydrea and Haemoglobin abnormal - a phase IV clinical study of FDA data

Summary:

Haemoglobin abnormal is reported as a side effect among people who take Hydrea (hydroxyurea), especially for people who are male, 60+ old, also take Nitrostat, and have Arthritis.

The phase IV clinical study analyzes which people have Haemoglobin abnormal when taking Hydrea. It is created by eHealthMe based on reports of 8,922 people who have side effects when taking Hydrea from the FDA, and is updated regularly.

What is Hydrea?

Hydrea has active ingredients of hydroxyurea. It is often used in polycythemia vera. eHealthMe is studying from 9,083 Hydrea users. Check the latest studies of Hydrea.

What is Haemoglobin abnormal?

Haemoglobin abnormal is found to be associated with 615 drugs and 1,009 conditions by eHealthMe. Check the latest studies of Haemoglobin abnormal.

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, 30, 2026

8,922 people reported to have side effects when taking Hydrea.
Among them, 14 people (0.16%) have Haemoglobin abnormal.

Could Hydrea cause Haemoglobin abnormal?

Among these 14 people:

What is the gender of people who have Haemoglobin abnormal when taking Hydrea? *

female: 45.45 %
male: 54.55 %

What is the age of people who have Haemoglobin abnormal when taking Hydrea? *

What are other drugs people take besides Hydrea? *

What are other side effects people have besides Haemoglobin abnormal? *

Thrombocytopenia (decrease of platelets in blood): 6 people, 42.86%
Fatigue (feeling of tiredness): 6 people, 42.86%
Chills (felling of cold): 6 people, 42.86%
Weakness: 5 people, 35.71%
Diverticulitis (digestive disease which involves the formation of pouches (diverticula) within the bowel wall): 5 people, 35.71%
Headache (pain in head): 5 people, 35.71%
Head Injury: 5 people, 35.71%
Haemoglobin Decreased: 5 people, 35.71%
Gait Disturbance: 5 people, 35.71%
Energy Increased: 5 people, 35.71%

What are the existing conditions these people have? *

Primary Myelofibrosis (primary disorder of the bone marrow): 5 people, 35.71%
Joint Pain: 5 people, 35.71%
Chronic Myeloid Leukaemia (long lasting type of cancer that starts in the blood-forming cells of the bone marrow and invades the blood): 5 people, 35.71%
Arthritis (form of joint disorder that involves inflammation of one or more joints): 5 people, 35.71%
Myelodysplastic Syndrome (a group of conditions that occur when the blood-forming cells in the bone marrow are damaged): 2 people, 14.29%
Migraine With Aura (headache with vision weakness): 1 person, 7.14%

* Approximation only. Some reports may have incomplete information.

Do you take Hydrea and have Haemoglobin abnormal?

- Check whether Haemoglobin abnormal is associated with a drug or a condition
- Predict drug outcomes for up to one year with AI
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Related studies:

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

Hydrea (9,083 reports)

Browse all side effects of Hydrea:

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 Haemoglobin abnormal:

Haemoglobin abnormal (615 drugs)

Browse all the conditions that are associated with Haemoglobin abnormal:

Haemoglobin abnormal (1,009 conditions)

How the study uses the data?

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