Ritalin and Abnormal faeces - a phase IV clinical study of FDA data

Summary:

Abnormal faeces is reported as a side effect among people who take Ritalin (methylphenidate hydrochloride), especially for people who are female, 60+ old, also take Vitamin D3, and have Drowsiness.

The phase IV clinical study analyzes which people have Abnormal faeces when taking Ritalin. It is created by eHealthMe based on reports of 26,179 people who have side effects when taking Ritalin from the FDA, and is updated regularly.

What is Ritalin?

Ritalin has active ingredients of methylphenidate hydrochloride. It is often used in attention deficit hyperactivity disorder. eHealthMe is studying from 29,427 Ritalin users. Check the latest studies of Ritalin.

What is Abnormal faeces?

Abnormal faeces (abnormal stool) is found to be associated with 753 drugs and 899 conditions by eHealthMe. Check the latest studies of Abnormal faeces.

On Jul, 14, 2026

26,179 people reported to have side effects when taking Ritalin.
Among them, 20 people (0.08%) have Abnormal faeces.

Among these 20 people:

What is the gender of people who have Abnormal faeces when taking Ritalin? *

female: 90 %
male: 10 %

What is the age of people who have Abnormal faeces when taking Ritalin? *

What are other drugs people take besides Ritalin? *

What are other side effects people have besides Abnormal faeces? *

Diarrhea: 18 people, 90.00%
Fatigue (feeling of tiredness): 18 people, 90.00%
Feeling Abnormal: 17 people, 85.00%
Stress And Anxiety: 17 people, 85.00%
Paraesthesia (sensation of tingling, tickling, prickling, pricking, or burning of a person's skin with no apparent long-term physical effect): 15 people, 75.00%
Muscle Spasms (muscle contraction): 13 people, 65.00%
Back Pain: 12 people, 60.00%
Confusional State: 12 people, 60.00%
Dizziness: 12 people, 60.00%
Libido Decreased (loss of interest in sex): 12 people, 60.00%

What are the existing conditions these people have? *

Drowsiness: 11 people, 55.00%
Stress And Anxiety: 7 people, 35.00%
Sleep Disorder: 7 people, 35.00%
Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 6 people, 30.00%
Blood Iron Decreased: 6 people, 30.00%
Red Blood Cell Count Decreased: 6 people, 30.00%
Pain: 6 people, 30.00%
Muscle Spasms (muscle contraction): 6 people, 30.00%
Menopause (end of monthly cycles in women): 6 people, 30.00%
Indigestion: 1 person, 5.00%

* Approximation only. Some reports may have incomplete information.

Do you take Ritalin and have Abnormal faeces?

- Check whether Abnormal faeces 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 Ritalin:

Ritalin (29,427 reports)

Abnormal faeces treatments and more:

Abnormal faeces (11,634 reports)

Browse all side effects of Ritalin:

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 Abnormal faeces:

Abnormal faeces (753 drugs)

Browse all the conditions that are associated with Abnormal faeces:

Abnormal faeces (899 conditions)

Related publications that referenced our studies

How the study uses the data?

The study uses data from the FDA. It is based on methylphenidate hydrochloride (the active ingredients of Ritalin) and Ritalin (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.