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

Summary:

Weakness is reported as a side effect among people who take Cysteine (n - acetyl cysteine), especially for people who are female, 60+ old, have been taking the drug for < 1 month also take Vitamin C, and have High blood pressure.

The phase IV clinical study analyzes which people have Weakness 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 Weakness?

Weakness is found to be associated with 3,642 drugs and 6,611 conditions by eHealthMe. Check the latest studies of Weakness.

On Jul, 09, 2026

1,641 people reported to have side effects when taking Cysteine.
Among them, 68 people (4.14%) have Weakness.

Among these 68 people:

How long have people been on Cysteine when they have Weakness? *

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

female: 53.23 %
male: 46.77 %

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

What are other drugs people take besides Cysteine? *

What are other side effects people have besides Weakness? *

Fatigue (feeling of tiredness): 20 people, 29.41%
Nausea (feeling of having an urge to vomit): 15 people, 22.06%
High Blood Pressure: 14 people, 20.59%
Dizziness: 14 people, 20.59%
Cough: 13 people, 19.12%
Fever: 12 people, 17.65%
Stress And Anxiety: 11 people, 16.18%
Diarrhea: 11 people, 16.18%
Headache (pain in head): 11 people, 16.18%
Feeling Abnormal: 11 people, 16.18%

What are the existing conditions these people have? *

High Blood Pressure: 10 people, 14.71%
Insomnia (sleeplessness): 8 people, 11.76%
Pain: 7 people, 10.29%
Thrombotic Thrombocytopenic Purpura (a rare blood disorder characterized by clotting in small blood vessels of the body): 6 people, 8.82%
Constipation: 6 people, 8.82%
Lambert-Eaton Syndrome (this means your immune system mistakenly targets healthy cells and tissues in the body): 5 people, 7.35%
Stress And Anxiety: 5 people, 7.35%
Drug-Induced Liver Injury (diseases of the liver that are caused by physician-prescribed medications): 5 people, 7.35%
Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 5 people, 7.35%
Rosacea (a skin condition that causes facial redness): 5 people, 7.35%

* Approximation only. Some reports may have incomplete information.

Do you take Cysteine 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 Cysteine:

Cysteine (1,755 reports)

Weakness treatments and more:

Weakness (586,876 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 Weakness:

Weakness (3,642 drugs)

Browse all the conditions that are associated with Weakness:

Weakness (6,611 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.