Symbyax and Drowsiness - a phase IV clinical study of FDA data

Summary:

Drowsiness is reported as a side effect among people who take Symbyax (fluoxetine hydrochloride; olanzapine), especially for people who are female, 40-49 old, have been taking the drug for < 1 month also take Zyprexa, and have Psychotic disorder.

The phase IV clinical study analyzes which people have Drowsiness when taking Symbyax. It is created by eHealthMe based on reports of 1,347 people who have side effects when taking Symbyax from the FDA, and is updated regularly.

What is Symbyax?

Symbyax has active ingredients of fluoxetine hydrochloride; olanzapine. It is often used in depression. eHealthMe is studying from 1,449 Symbyax users. Check the latest studies of Symbyax.

What is Drowsiness?

Drowsiness is found to be associated with 2,863 drugs and 4,800 conditions by eHealthMe. Check the latest studies of Drowsiness.

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, 01, 2026

1,347 people reported to have side effects when taking Symbyax.
Among them, 60 people (4.45%) have Drowsiness.

Among these 60 people:

How long have people been on Symbyax when they have Drowsiness? *

What is the gender of people who have Drowsiness when taking Symbyax? *

female: 65 %
male: 35 %

What is the age of people who have Drowsiness when taking Symbyax? *

What are other drugs people take besides Symbyax? *

What are other side effects people have besides Drowsiness? *

Weight Increased: 21 people, 35.00%
Appetite - Increased (increased appetite is when you want to eat much more often or in larger quantities than your body requires): 17 people, 28.33%
Fatigue (feeling of tiredness): 16 people, 26.67%
High Blood Pressure: 13 people, 21.67%
Pancreatitis (inflammation of pancreas): 12 people, 20.00%
Panic Disorder: 12 people, 20.00%
Drug Ineffective: 12 people, 20.00%
Confusional State: 11 people, 18.33%
Mood Swings (an extreme or rapid change in mood): 11 people, 18.33%
Feeling Abnormal: 11 people, 18.33%

What are the existing conditions these people have? *

Psychotic Disorder: 8 people, 13.33%
Attention Deficit Hyperactivity Disorder (a chronic condition including attention difficulty, hyperactivity, and impulsiveness): 5 people, 8.33%
Sleep Disorder: 4 people, 6.67%
Stress And Anxiety: 2 people, 3.33%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 2 people, 3.33%
Major Depression (a mood state that goes well beyond temporarily feeling sad or blue. it is a serious medical illness that affects one's thoughts, feelings): 2 people, 3.33%
Affective Disorder (mental disorder): 2 people, 3.33%
Oedema (fluid collection in tissue): 2 people, 3.33%
Pain: 2 people, 3.33%
Panic Disorder: 2 people, 3.33%

* Approximation only. Some reports may have incomplete information.

Do you take Symbyax and have Drowsiness?

- Check whether Drowsiness 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 Symbyax:

Symbyax (1,449 reports)

Drowsiness treatments and more:

Drowsiness (269,040 reports)

How severe was Drowsiness and when was it recovered:

Drowsiness in Symbyax

Expand to all the drugs that have ingredients of fluoxetine hydrochloride; olanzapine:

Drowsiness and drugs with ingredients of fluoxetine hydrochloride; olanzapine

Sub-studies by gender and age:

Female: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Male: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Browse all side effects of Symbyax:

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 Drowsiness:

Drowsiness (2,863 drugs)

Browse all the conditions that are associated with Drowsiness:

Drowsiness (4,800 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on fluoxetine hydrochloride; olanzapine (the active ingredients of Symbyax) and Symbyax (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.