Cyanocobalamin and Weight fluctuation - a phase IV clinical study of FDA data

Summary:

Weight fluctuation is reported as a side effect among people who take Cyanocobalamin (cyanocobalamin), especially for people who are female, 60+ old, also take Epinephrine, and have Crohn's disease.

The phase IV clinical study analyzes which people have Weight fluctuation when taking Cyanocobalamin. It is created by eHealthMe based on reports of 14,464 people who have side effects when taking Cyanocobalamin from the FDA, and is updated regularly.

What is Cyanocobalamin?

Cyanocobalamin has active ingredients of cyanocobalamin. It is often used in vitamin b12 deficiency. eHealthMe is studying from 14,651 Cyanocobalamin users. Check the latest studies of Cyanocobalamin.

What is Weight fluctuation?

Weight fluctuation is found to be associated with 897 drugs and 1,030 conditions by eHealthMe. Check the latest studies of Weight fluctuation.

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, 26, 2026

14,464 people reported to have side effects when taking Cyanocobalamin.
Among them, 52 people (0.36%) have Weight fluctuation.

Could Cyanocobalamin cause Weight fluctuation?

Among these 52 people:

What is the gender of people who have Weight fluctuation when taking Cyanocobalamin? *

female: 89.58 %
male: 10.42 %

What is the age of people who have Weight fluctuation when taking Cyanocobalamin? *

What are other drugs people take besides Cyanocobalamin? *

What are other side effects people have besides Weight fluctuation? *

Dyspnea (difficult or laboured breathing): 18 people, 34.62%
Fatigue (feeling of tiredness): 17 people, 32.69%
Nausea (feeling of having an urge to vomit): 16 people, 30.77%
Headache (pain in head): 14 people, 26.92%
Weight Decreased: 13 people, 25.00%
Urinary Tract Infection: 13 people, 25.00%
Fluid Retention (an abnormal accumulation of fluid in the blood): 12 people, 23.08%
Malaise (a feeling of general discomfort or uneasiness): 11 people, 21.15%
Weight Increased: 11 people, 21.15%
Abscess Oral (abscess in the mouth): 10 people, 19.23%

What are the existing conditions these people have? *

Crohn's Disease (a condition that causes inflammation of the gastrointestinal tract): 11 people, 21.15%
Immunodeficiency Common Variable: 10 people, 19.23%
Fever: 6 people, 11.54%
Ulcerative Colitis (inflammatory bowel disease (ibd). it causes swelling, ulcerations, and loss of function of the large intestine): 6 people, 11.54%
Short-Bowel Syndrome (a condition in which the body cannot absorb enough fluids and nutrients because part of the small intestine is missing): 5 people, 9.62%
Myasthenia Gravis (a chronic condition that causes muscles to tire and weaken easily): 5 people, 9.62%
Nausea (feeling of having an urge to vomit): 4 people, 7.69%
Parkinson's Disease: 3 people, 5.77%
Stress And Anxiety: 2 people, 3.85%
High Blood Pressure: 2 people, 3.85%

* Approximation only. Some reports may have incomplete information.

Do you take Cyanocobalamin and have Weight fluctuation?

- Check whether Weight fluctuation 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 Cyanocobalamin:

Cyanocobalamin (14,651 reports)

Browse all side effects of Cyanocobalamin:

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 Weight fluctuation:

Weight fluctuation (897 drugs)

Browse all the conditions that are associated with Weight fluctuation:

Weight fluctuation (1,030 conditions)

How the study uses the data?

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