Ester c and Weakness - a phase IV clinical study of FDA data

Summary:

Weakness is reported as a side effect among people who take Ester c (l-ascorbic acid), especially for people who are female, 60+ old, also take Vitamin D3, and have Polycythaemia vera.

The phase IV clinical study analyzes which people have Weakness when taking Ester c. It is created by eHealthMe based on reports of 284 people who have side effects when taking Ester c from the FDA, and is updated regularly.

What is Ester c?

Ester c has active ingredients of l-ascorbic acid. eHealthMe is studying from 306 Ester c users. Check the latest studies of Ester c.

What is Weakness?

Weakness is found to be associated with 3,640 drugs and 6,612 conditions by eHealthMe. Check the latest studies of Weakness.

On Jul, 22, 2026

284 people reported to have side effects when taking Ester c.
Among them, 29 people (10.21%) have Weakness.

Among these 29 people:

What is the gender of people who have Weakness when taking Ester c? *

female: 65 %
male: 35 %

What is the age of people who have Weakness when taking Ester c? *

What are other drugs people take besides Ester c? *

What are other side effects people have besides Weakness? *

Fatigue (feeling of tiredness): 21 people, 72.41%
Dyspnea (difficult or laboured breathing): 13 people, 44.83%
Dizziness: 11 people, 37.93%
Joint Pain: 10 people, 34.48%
Drowsiness: 9 people, 31.03%
Pain: 9 people, 31.03%
Muscle Aches (muscle pain): 9 people, 31.03%
Back Pain: 9 people, 31.03%
Stress And Anxiety: 8 people, 27.59%
Headache (pain in head): 8 people, 27.59%

What are the existing conditions these people have? *

Polycythaemia Vera (blood disorder in which the bone marrow makes too many red blood cells): 8 people, 27.59%
Primary Myelofibrosis (primary disorder of the bone marrow): 7 people, 24.14%
Breast Cancer Metastatic: 4 people, 13.79%
Constipation: 4 people, 13.79%
Pain: 4 people, 13.79%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 3 people, 10.34%
Hypersensitivity: 2 people, 6.90%
High Blood Pressure: 2 people, 6.90%
Idiopathic Pulmonary Fibrosis (chronic lung disease): 2 people, 6.90%
Diverticulitis (digestive disease which involves the formation of pouches (diverticula) within the bowel wall): 2 people, 6.90%

* Approximation only. Some reports may have incomplete information.

Do you take Ester c and have Weakness?

- Check whether Weakness 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 Ester c:

Ester c (306 reports)

Weakness treatments and more:

Weakness (586,876 reports)

Browse all side effects of Ester c:

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 Weakness:

Weakness (3,640 drugs)

Browse all the conditions that are associated with Weakness:

Weakness (6,612 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on l-ascorbic acid (the active ingredients of Ester c) and Ester c (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.