Cysteine and Acne - a phase IV clinical study of FDA data

Summary:

Acne is reported as a side effect among people who take Cysteine (n - acetyl cysteine), especially for people who are female, 60+ old, also take Vitamin C, and have Stress and anxiety.

The phase IV clinical study analyzes which people have Acne when taking Cysteine. It is created by eHealthMe based on reports of 1,641 people who have side effects when taking Cysteine from the FDA, and is updated regularly.

What is Cysteine?

Cysteine has active ingredients of n - acetyl cysteine. eHealthMe is studying from 1,755 Cysteine users. Check the latest studies of Cysteine.

What is Acne?

Acne (skin problems that cause pimples) is found to be associated with 1,313 drugs and 2,344 conditions by eHealthMe. Check the latest studies of Acne.

On Jul, 08, 2026

1,641 people reported to have side effects when taking Cysteine.
Among them, 12 people (0.73%) have Acne.

Among these 12 people:

What is the gender of people who have Acne when taking Cysteine? *

female: 54.55 %
male: 45.45 %

What is the age of people who have Acne when taking Cysteine? *

What are other drugs people take besides Cysteine? *

What are other side effects people have besides Acne? *

Stress And Anxiety: 7 people, 58.33%
Insomnia (sleeplessness): 7 people, 58.33%
Gait Disturbance: 6 people, 50.00%
Muscle Spasms (muscle contraction): 6 people, 50.00%
Fatigue (feeling of tiredness): 6 people, 50.00%
Headache (pain in head): 6 people, 50.00%
Malignant Neoplasm Progression (cancer tumour came back): 5 people, 41.67%
Heart Palpitations (feelings or sensations that your heart is pounding or racing): 5 people, 41.67%
Dyspnea Exertional: 4 people, 33.33%
Nosebleed (bleeding from nose): 4 people, 33.33%

What are the existing conditions these people have? *

Stress And Anxiety: 3 people, 25.00%
Carcinoid Tumor: 2 people, 16.67%
Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 2 people, 16.67%
Hypersensitivity: 1 person, 8.33%
Cataplexy (loss of muscle tone accompanied by full conscious awareness): 1 person, 8.33%
Cystic Fibrosis (disease of the secretary glands): 1 person, 8.33%
Depression: 1 person, 8.33%
Dyspnea (difficult or laboured breathing): 1 person, 8.33%
Fibromyalgia (a long-term condition which causes pain all over the body): 1 person, 8.33%
Gastrointestinal Pain: 1 person, 8.33%

* Approximation only. Some reports may have incomplete information.

Do you take Cysteine and have Acne?

- Check whether Acne 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 Cysteine:

Cysteine (1,755 reports)

Acne treatments and more:

Acne (179,011 reports)

Browse all side effects of Cysteine:

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 Acne:

Acne (1,313 drugs)

Browse all the conditions that are associated with Acne:

Acne (2,344 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on n - acetyl cysteine (the active ingredients of Cysteine) and Cysteine (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.