Hetlioz and Fatigue aggravated - a phase IV clinical study of FDA data

Summary:

Fatigue aggravated is reported as a side effect among people who take Hetlioz (tasimelteon), especially for people who are female, 60+ old, have been taking the drug for 1 - 6 months also take Klonopin, and have Circadian rhythm sleep disorder.

The phase IV clinical study analyzes which people have Fatigue aggravated when taking Hetlioz. It is created by eHealthMe based on reports of 7,418 people who have side effects when taking Hetlioz from the FDA, and is updated regularly.

What is Hetlioz?

Hetlioz has active ingredients of tasimelteon. eHealthMe is studying from 7,418 Hetlioz users. Check the latest studies of Hetlioz.

What is Fatigue aggravated?

Fatigue aggravated (feeling of tiredness) is found to be associated with 3,165 drugs and 1,117 conditions by eHealthMe. Check the latest studies of Fatigue aggravated.

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

7,418 people reported to have side effects when taking Hetlioz.
Among them, 320 people (4.31%) have Fatigue aggravated.

Among these 320 people:

* Approximation only. Some reports may have incomplete information.

Do you take Hetlioz and have Fatigue aggravated?

- Check whether Fatigue aggravated 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 Hetlioz:

Hetlioz (7,418 reports)

Fatigue aggravated treatments and more:

Fatigue aggravated (252 reports)

How severe was Fatigue aggravated and when was it recovered:

Fatigue aggravated in Hetlioz

Expand to all the drugs that have ingredients of tasimelteon:

Fatigue aggravated and drugs with ingredients of tasimelteon

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 Hetlioz:

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 Fatigue aggravated:

Fatigue aggravated (3,165 drugs)

Browse all the conditions that are associated with Fatigue aggravated:

Fatigue aggravated (1,117 conditions)

How the study uses the data?

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