Caffeine and Confusion - a phase IV clinical study of FDA data

Summary:

Confusion is reported as a side effect among people who take Caffeine (caffeine), especially for people who are male, 60+ old, have been taking the drug for < 1 month also take Paracetamol, and have Hypothyroidism.

The phase IV clinical study analyzes which people have Confusion when taking Caffeine. It is created by eHealthMe based on reports of 6,333 people who have side effects when taking Caffeine from the FDA, and is updated regularly.

What is Caffeine?

Caffeine has active ingredients of caffeine. It is often used in fatigue. eHealthMe is studying from 6,667 Caffeine users. Check the latest studies of Caffeine.

What is Confusion?

Confusion is found to be associated with 1,832 drugs and 2,825 conditions by eHealthMe. Check the latest studies of Confusion.

On Jul, 16, 2026

6,333 people reported to have side effects when taking Caffeine.
Among them, 37 people (0.58%) have Confusion.

Among these 37 people:

How long have people been on Caffeine when they have Confusion? *

What is the gender of people who have Confusion when taking Caffeine? *

female: 37.84 %
male: 62.16 %

What is the age of people who have Confusion when taking Caffeine? *

What are other drugs people take besides Caffeine? *

What are other side effects people have besides Confusion? *

Confusional State: 27 people, 72.97%
Fever: 19 people, 51.35%
Stroke (sudden death of a portion of the brain cells due to a lack of oxygen): 15 people, 40.54%
Speech Disorder: 15 people, 40.54%
Dizziness: 15 people, 40.54%
Feeling Abnormal: 14 people, 37.84%
Insomnia (sleeplessness): 13 people, 35.14%
Arrhythmias (irregular heartbeat): 12 people, 32.43%
Stress And Anxiety: 12 people, 32.43%
Fall: 12 people, 32.43%

What are the existing conditions these people have? *

Headache (pain in head): 11 people, 29.73%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 11 people, 29.73%
Acromegaly (body produces too much growth hormone, leading to excess growth of body tissues): 10 people, 27.03%
Muscle Aches (muscle pain): 10 people, 27.03%
High Blood Pressure: 10 people, 27.03%
Sleep Disorder: 10 people, 27.03%
Emphysema (chronic respiratory disease - over inflation of the air sacs (alveoli) in the lungs): 10 people, 27.03%
Head Injury: 10 people, 27.03%
Pain: 10 people, 27.03%
Chronic Thyroiditis (long lasting inflammation of thyroid gland): 10 people, 27.03%

* Approximation only. Some reports may have incomplete information.

Do you take Caffeine and have Confusion?

- Check whether Confusion 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 Caffeine:

Caffeine (6,667 reports)

Confusion treatments and more:

Confusion (65,237 reports)

Browse all side effects of Caffeine:

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 Confusion:

Confusion (1,832 drugs)

Browse all the conditions that are associated with Confusion:

Confusion (2,825 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on caffeine (the active ingredients of Caffeine) and Caffeine (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.