Vitamin c and Parosmia - a phase IV clinical study of FDA data

Summary:

Parosmia is reported as a side effect among people who take Vitamin c (l-ascorbic acid), especially for people who are female, 60+ old, also take Vitamin B12, and have High blood pressure.

The phase IV clinical study analyzes which people have Parosmia when taking Vitamin c. It is created by eHealthMe based on reports of 89,802 people who have side effects when taking Vitamin c from the FDA, and is updated regularly.

What is Vitamin c?

Vitamin c has active ingredients of l-ascorbic acid. It is often used in immune response. eHealthMe is studying from 92,472 Vitamin c users. Check the latest studies of Vitamin c.

What is Parosmia?

Parosmia (distortion of the sense of smell, as in smelling odours that are not present) is found to be associated with 698 drugs and 763 conditions by eHealthMe. Check the latest studies of Parosmia.

On Jul, 11, 2026

89,802 people reported to have side effects when taking Vitamin c.
Among them, 86 people (0.1%) have Parosmia.

Among these 86 people:

What is the gender of people who have Parosmia when taking Vitamin c? *

female: 70.37 %
male: 29.63 %

What is the age of people who have Parosmia when taking Vitamin c? *

What are other drugs people take besides Vitamin c? *

What are other side effects people have besides Parosmia? *

Fatigue (feeling of tiredness): 35 people, 40.70%
Nausea (feeling of having an urge to vomit): 27 people, 31.40%
Taste - Impaired: 27 people, 31.40%
Headache (pain in head): 23 people, 26.74%
Weight Decreased: 18 people, 20.93%
Pain: 16 people, 18.60%
Joint Pain: 15 people, 17.44%
Pain In Extremity: 14 people, 16.28%
Fever: 14 people, 16.28%
Dyspnea (difficult or laboured breathing): 13 people, 15.12%

What are the existing conditions these people have? *

Pain: 6 people, 6.98%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 6 people, 6.98%
High Blood Pressure: 6 people, 6.98%
Ovarian Cancer (cancer of ovary): 5 people, 5.81%
High Blood Cholesterol: 5 people, 5.81%
Chronic Lymphocytic Leukaemia (cancer in which the bone marrow makes too many lymphocytes (a type of white blood cell)): 5 people, 5.81%
Depression: 5 people, 5.81%
Asthma: 4 people, 4.65%
Primary Pulmonary Hypertension (primary high blood pressure that affects the arteries in the lungs and the right side of your heart): 4 people, 4.65%
Multiple Myeloma (cancer of the plasma cells): 3 people, 3.49%

* Approximation only. Some reports may have incomplete information.

Do you take Vitamin c and have Parosmia?

- Check whether Parosmia 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 c:

Vitamin c (92,472 reports)

Parosmia treatments and more:

Parosmia (8,965 reports)

Browse all side effects of Vitamin 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 Parosmia:

Parosmia (698 drugs)

Browse all the conditions that are associated with Parosmia:

Parosmia (763 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 Vitamin c) and Vitamin 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.