Vitamins and Haematocrit increased - a phase IV clinical study of FDA data

Summary:

Haematocrit increased is reported as a side effect among people who take Vitamins (ascorbic acid; biotin; cyanocobalamin; dexpanthenol; ergocalciferol; folic acid; niacinamide; pyridoxine hydrochloride; riboflavin phosphate sodium; thiamine hydrochloride; vitamin a; vitamin e), especially for people who are female, 60+ old, also take Jakafi, and have Polycythaemia vera.

The phase IV clinical study analyzes which people have Haematocrit increased when taking Vitamins. It is created by eHealthMe based on reports of 121,858 people who have side effects when taking Vitamins from the FDA, and is updated regularly.

What is Vitamins?

Vitamins has active ingredients of ascorbic acid; biotin; cyanocobalamin; dexpanthenol; ergocalciferol; folic acid; niacinamide; pyridoxine hydrochloride; riboflavin phosphate sodium; thiamine hydrochloride; vitamin a; vitamin e. It is often used in vitamin supplementation. eHealthMe is studying from 122,456 Vitamins users. Check the latest studies of Vitamins.

What is Haematocrit increased?

Haematocrit increased is found to be associated with 407 drugs and 747 conditions by eHealthMe. Check the latest studies of Haematocrit increased.

On Jul, 06, 2026

121,858 people reported to have side effects when taking Vitamins.
Among them, 49 people (0.04%) have Haematocrit increased.

Could Vitamins cause Haematocrit increased?

Among these 49 people:

What is the gender of people who have Haematocrit increased when taking Vitamins? *

female: 65 %
male: 35 %

What is the age of people who have Haematocrit increased when taking Vitamins? *

What are other drugs people take besides Vitamins? *

What are other side effects people have besides Haematocrit increased? *

Haemoglobin Increased: 16 people, 32.65%
Platelet Count Increased: 9 people, 18.37%
Pollakiuria (abnormally frequent passage of relatively small quantities or urine): 9 people, 18.37%
Dizziness: 9 people, 18.37%
Rashes (redness): 9 people, 18.37%
Blood Count Abnormal: 9 people, 18.37%
Pain: 8 people, 16.33%
Dry Skin: 8 people, 16.33%
Full Blood Count Abnormal: 8 people, 16.33%
Therapeutic Response Unexpected: 8 people, 16.33%

What are the existing conditions these people have? *

Polycythaemia Vera (blood disorder in which the bone marrow makes too many red blood cells): 29 people, 59.18%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 5 people, 10.20%
Primary Myelofibrosis (primary disorder of the bone marrow): 3 people, 6.12%
Cardiac Flutter (abnormal heart rhythm): 3 people, 6.12%
Growth Hormone Deficiency: 3 people, 6.12%
Wheezing (a high-pitched whistling sound made while you breath): 3 people, 6.12%
Pain: 2 people, 4.08%
Blood Thyroid Stimulating Hormone Decreased: 2 people, 4.08%
Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 2 people, 4.08%
Immunodeficiency Disorders: 2 people, 4.08%

* Approximation only. Some reports may have incomplete information.

Do you take Vitamins and have Haematocrit increased?

- Check whether Haematocrit increased 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 Vitamins:

Vitamins (122,456 reports)

Haematocrit increased treatments and more:

Haematocrit increased (3,120 reports)

How severe was Haematocrit increased and when was it recovered:

Haematocrit increased in Vitamins

Expand to all the drugs that have ingredients of ascorbic acid; biotin; cyanocobalamin; dexpanthenol; ergocalciferol; folic acid; niacinamide; pyridoxine hydrochloride; riboflavin phosphate sodium; thiamine hydrochloride; vitamin a; vitamin e:

Haematocrit increased and drugs with ingredients of ascorbic acid; biotin; cyanocobalamin; dexpanthenol; ergocalciferol; folic acid; niacinamide; pyridoxine hydrochloride; riboflavin phosphate sodium; thiamine hydrochloride; vitamin a; vitamin e (120 reports)

Sub-studies by gender and age:

Female: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Male: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Browse all side effects of Vitamins:

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 Haematocrit increased:

Haematocrit increased (407 drugs)

Browse all the conditions that are associated with Haematocrit increased:

Haematocrit increased (747 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on ascorbic acid; biotin; cyanocobalamin; dexpanthenol; ergocalciferol; folic acid; niacinamide; pyridoxine hydrochloride; riboflavin phosphate sodium; thiamine hydrochloride; vitamin a; vitamin e (the active ingredients of Vitamins) and Vitamins (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.