Vitamin b12 and Shock haemorrhagic - a phase IV clinical study of FDA data

Summary:

Shock haemorrhagic is reported as a side effect among people who take Vitamin b12 (cobalamin), especially for people who are male, 60+ old, have been taking the drug for < 1 month also take Vitamin D3, and have Atrial fibrillation/flutter.

The phase IV clinical study analyzes which people have Shock haemorrhagic 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 121,681 Vitamin b12 users. Check the latest studies of Vitamin b12.

What is Shock haemorrhagic?

Shock haemorrhagic (a life-threatening condition with symptoms like low blood pressure, weakness, shallow breathing, cold, clammy skin due to excess bleeding) is found to be associated with 654 drugs and 800 conditions by eHealthMe. Check the latest studies of Shock haemorrhagic.

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, 20, 2026

119,611 people reported to have side effects when taking Vitamin b12.
Among them, 46 people (0.04%) have Shock haemorrhagic.

Could Vitamin b12 cause Shock haemorrhagic?

Among these 46 people:

How long have people been on Vitamin b12 when they have Shock haemorrhagic? *

What is the gender of people who have Shock haemorrhagic when taking Vitamin b12? *

female: 32.61 %
male: 67.39 %

What is the age of people who have Shock haemorrhagic when taking Vitamin b12? *

What are other drugs people take besides Vitamin b12? *

What are other side effects people have besides Shock haemorrhagic? *

Gastrointestinal Haemorrhage (bleeding gastrointestinal tract): 12 people, 26.09%
Weakness: 8 people, 17.39%
Iron Deficiency Anaemia: 8 people, 17.39%
Anaemia (lack of blood): 7 people, 15.22%
Gastroduodenal Haemorrhage (bleeding from stomach or duodenum ulcer): 7 people, 15.22%
Upper Gastrointestinal Haemorrhage (upper gastrointestinal bleeding): 6 people, 13.04%
Bleeding Disorders: 6 people, 13.04%
Dyspnea (difficult or laboured breathing): 5 people, 10.87%
Respiratory Acidosis (respiratory failure or ventilatory failure, causes the ph of blood and other bodily fluids to decrease): 4 people, 8.70%
Rectal Haemorrhage (bleeding from anus): 4 people, 8.70%

What are the existing conditions these people have? *

Atrial Fibrillation/flutter (atrial fibrillation and flutter are abnormal heart rhythms in which the atria, or upper chambers of the heart, are out of sync with the ventricles): 16 people, 34.78%
High Blood Pressure: 12 people, 26.09%
Osteoarthritis (a joint disease caused by cartilage loss in a joint): 8 people, 17.39%
Oedema Peripheral (superficial swelling): 7 people, 15.22%
Dizziness: 7 people, 15.22%
Age-Related Macular Degeneration: 7 people, 15.22%
Pain: 7 people, 15.22%
Herpes Zoster: 7 people, 15.22%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 7 people, 15.22%
Enlarged Prostate: 7 people, 15.22%

* Approximation only. Some reports may have incomplete information.

Do you take Vitamin b12 and have Shock haemorrhagic?

- Check whether Shock haemorrhagic 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 (121,681 reports)

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 Shock haemorrhagic:

Shock haemorrhagic (654 drugs)

Browse all the conditions that are associated with Shock haemorrhagic:

Shock haemorrhagic (800 conditions)

Related publications that referenced our studies

Hwabejire JO, Lu J, Liu B, Li Y, Halaweish I, Alam HB, "Valproic acid for the treatment of hemorrhagic shock: a dose-optimization study", journal of surgical research, 2014 Jan .
Hwabejire JO, Lu J, Liu B, Li Y, Halaweish I, Alam HB, "Valproic acid for the treatment of hemorrhagic shock: a dose-optimization study", journal of surgical research, 2014 Jan .

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.