Kapvay and Abnormal behavior - a phase IV clinical study of FDA data

Summary:

Abnormal behavior is reported as a side effect among people who take Kapvay (clonidine hydrochloride), especially for people who are male, 2-9 old, have been taking the drug for < 1 month also take Clonidine, and have Complex partial seizures.

The phase IV clinical study analyzes which people have Abnormal behavior when taking Kapvay. It is created by eHealthMe based on reports of 213 people who have side effects when taking Kapvay from the FDA, and is updated regularly.

What is Kapvay?

Kapvay has active ingredients of clonidine hydrochloride. It is often used in attention deficit hyperactivity disorder. eHealthMe is studying from 246 Kapvay users. Check the latest studies of Kapvay.

What is Abnormal behavior?

Abnormal behavior is found to be associated with 1,358 drugs and 1,957 conditions by eHealthMe. Check the latest studies of Abnormal behavior.

eHealthMe: drug outcomes in the real world

eHealthMe runs one of the largest post-marketing drug safety studies in the world. We study millions of patients and 5,000 more each day. Our data-driven phase IV clinical trials have been referenced on 800+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Tools to study our phase IV findings are available to the public, anonymous and free >>>.

On Aug, 30, 2026

213 people reported to have side effects when taking Kapvay.
Among them, 12 people (5.63%) have Abnormal behavior.

Among these 12 people:

How long have people been on Kapvay when they have Abnormal behavior? *

What is the gender of people who have Abnormal behavior when taking Kapvay? *

female: 20 %
male: 80 %

What is the age of people who have Abnormal behavior when taking Kapvay? *

What are other drugs people take besides Kapvay? *

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

Social Avoidant Behavior: 3 people, 25.00%
Speech Impairment (Adult) (inability to speak (adult)): 3 people, 25.00%
Psychotic Behavior: 3 people, 25.00%
Decreased Eye Contact: 3 people, 25.00%
Crying: 2 people, 16.67%
Anger: 2 people, 16.67%
Drowsiness: 2 people, 16.67%
Disturbance In Attention: 1 person, 8.33%
Drug Level Increased: 1 person, 8.33%
Dizziness: 1 person, 8.33%

What are the existing conditions these people have? *

Stress And Anxiety: 1 person, 8.33%
Mood Swings (an extreme or rapid change in mood): 1 person, 8.33%
Intermittent Explosive Disorder (behavioural disorder characterized by extreme expressions of anger): 1 person, 8.33%
High Blood Pressure: 1 person, 8.33%
Complex Partial Seizures (epileptic seizure): 1 person, 8.33%

* Approximation only. Some reports may have incomplete information.

Do you take Kapvay and have Abnormal behavior?

- Check whether Abnormal behavior is associated with a drug or a condition
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Related studies:

Effectiveness of, long term effects of, and alternative drugs to Kapvay:

Kapvay (246 reports)

Browse all side effects of Kapvay:

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 behavior:

Abnormal behavior (1,358 drugs)

Browse all the conditions that are associated with Abnormal behavior:

Abnormal behavior (1,957 conditions)

How the study uses the data?

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