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

Summary:

Abnormal behavior is reported as a side effect among people who take Fluoxetine hydrochloride (fluoxetine hydrochloride), especially for people who are male, 40-49 old, have been taking the drug for 2 - 5 years also take Omeprazole, and have Cataplexy.

The phase IV clinical study analyzes which people have Abnormal behavior when taking Fluoxetine hydrochloride. It is created by eHealthMe based on reports of 11,975 people who have side effects when taking Fluoxetine hydrochloride from the FDA, and is updated regularly.

What is Fluoxetine hydrochloride?

Fluoxetine hydrochloride has active ingredients of fluoxetine hydrochloride. It is often used in depression. eHealthMe is studying from 13,381 Fluoxetine hydrochloride users. Check the latest studies of Fluoxetine hydrochloride.

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 Sep, 02, 2026

11,975 people reported to have side effects when taking Fluoxetine hydrochloride.
Among them, 96 people (0.8%) have Abnormal behavior.

Could Fluoxetine hydrochloride cause Abnormal behavior?

Among these 96 people:

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

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

female: 48.86 %
male: 51.14 %

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

What are other drugs people take besides Fluoxetine hydrochloride? *

Omeprazole: 11 people, 11.46%
Xyrem: 10 people, 10.42%
Abilify: 9 people, 9.38%
Prozac: 9 people, 9.38%
Clonazepam: 8 people, 8.33%
Lamotrigine: 7 people, 7.29%
Acetaminophen: 6 people, 6.25%
Armodafinil: 6 people, 6.25%
Donepezil Hydrochloride: 6 people, 6.25%
Zolpidem Tartrate: 6 people, 6.25%

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

Confusional State: 20 people, 20.83%
Fatigue (feeling of tiredness): 13 people, 13.54%
Tremor (trembling or shaking movements in one or more parts of your body): 13 people, 13.54%
Dizziness: 13 people, 13.54%
Memory Loss: 12 people, 12.50%
Agitation (state of anxiety or nervous excitement): 12 people, 12.50%
Suicidal Ideation: 11 people, 11.46%
Suicide Attempt: 10 people, 10.42%
Disinhibition (loss of inhibition): 9 people, 9.38%
Insomnia (sleeplessness): 9 people, 9.38%

What are the existing conditions these people have? *

Cataplexy (loss of muscle tone accompanied by full conscious awareness): 9 people, 9.38%
Bipolar Disorder (mood disorder): 8 people, 8.33%
Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 8 people, 8.33%
Middle Insomnia (difficulty returning to sleep after awakening either in the middle of the night): 7 people, 7.29%
Obsessive-Compulsive Disorder (an anxiety disorder characterized by intrusive thoughts that produce uneasiness, apprehension, fear, or worry;): 5 people, 5.21%
High Blood Pressure: 4 people, 4.17%
Asthma: 4 people, 4.17%
Schizophrenia (a mental disorder characterized by a breakdown of thought processes): 4 people, 4.17%
Attention Deficit Hyperactivity Disorder (a chronic condition including attention difficulty, hyperactivity, and impulsiveness): 4 people, 4.17%
Ill-Defined Disorder: 4 people, 4.17%

* Approximation only. Some reports may have incomplete information.

Do you take Fluoxetine hydrochloride and have Abnormal behavior?

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Related studies:

Effectiveness of, long term effects of, and alternative drugs to Fluoxetine hydrochloride:

Fluoxetine hydrochloride (13,381 reports)

Browse all side effects of Fluoxetine hydrochloride:

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 fluoxetine hydrochloride (the active ingredients of Fluoxetine hydrochloride) and Fluoxetine hydrochloride (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.