Vitamin b12 and Platelet count increased - a phase IV clinical study of FDA data

Summary:

Platelet count increased is reported as a side effect among people who take Vitamin b12 (cobalamin), especially for people who are female, 60+ old, also take Jakafi, and have Polycythaemia vera.

The phase IV clinical study analyzes which people have Platelet count increased when taking Vitamin b12. It is created by eHealthMe based on reports of 119,611 people who have side effects when taking Vitamin b12 from the FDA, and is updated regularly.

What is Vitamin b12?

Vitamin b12 has active ingredients of cobalamin. It is often used in vitamin b12 deficiency. eHealthMe is studying from 121,684 Vitamin b12 users. Check the latest studies of Vitamin b12.

What is Platelet count increased?

Platelet count increased is found to be associated with 957 drugs and 1,190 conditions by eHealthMe. Check the latest studies of Platelet 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 Sep, 02, 2026

119,611 people reported to have side effects when taking Vitamin b12.
Among them, 273 people (0.23%) have Platelet count increased.

Could Vitamin b12 cause Platelet count increased?

Among these 273 people:

What is the gender of people who have Platelet count increased when taking Vitamin b12? *

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What is the age of people who have Platelet count increased when taking Vitamin b12? *

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* Approximation only. Some reports may have incomplete information.

Do you take Vitamin b12 and have Platelet count increased?

- Check whether Platelet count 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 Vitamin b12:

Vitamin b12 (121,684 reports)

Platelet count increased treatments and more:

Platelet count increased (18,565 reports)

How severe was Platelet count increased and when was it recovered:

Platelet count increased in Vitamin b12

Expand to all the drugs that have ingredients of cobalamin:

Platelet count increased and drugs with ingredients of cobalamin (273 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 Vitamin b12:

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 Platelet count increased:

Platelet count increased (957 drugs)

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

Platelet count increased (1,190 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on cobalamin (the active ingredients of Vitamin b12) and Vitamin b12 (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.