Amrix and Insomnia - a phase IV clinical study of FDA data

Summary:

Insomnia is reported as a side effect among people who take Amrix (cyclobenzaprine hydrochloride), especially for people who are male, 40-49 old, have been taking the drug for < 1 month also take Nuvigil, and have Narcolepsy.

The phase IV clinical study analyzes which people have Insomnia when taking Amrix. It is created by eHealthMe based on reports of 898 people who have side effects when taking Amrix from the FDA, and is updated regularly.

What is Amrix?

Amrix has active ingredients of cyclobenzaprine hydrochloride. It is often used in back pain. eHealthMe is studying from 1,130 Amrix users. Check the latest studies of Amrix.

What is Insomnia?

Insomnia (sleeplessness) is found to be associated with 3,118 drugs and 5,156 conditions by eHealthMe. Check the latest studies of Insomnia.

On Feb, 16, 2026

898 people reported to have side effects when taking Amrix.
Among them, 31 people (3.45%) have Insomnia.

Among these 31 people:

How long have people been on Amrix when they have Insomnia? *

What is the gender of people who have Insomnia when taking Amrix? *

female: 40 %
male: 60 %

What is the age of people who have Insomnia when taking Amrix? *

What are other drugs people take besides Amrix? *

Nuvigil: 10 people, 32.26%
Xyrem: 9 people, 29.03%
Ambien: 8 people, 25.81%
Adderall: 7 people, 22.58%
Cymbalta: 7 people, 22.58%
Dexilant: 7 people, 22.58%
Rapaflo: 6 people, 19.35%
Strattera: 6 people, 19.35%
Triamterene And Hydrochlorothiazide: 6 people, 19.35%
Allegra Allergy: 6 people, 19.35%

What are other side effects people have besides Insomnia? *

Pain: 9 people, 29.03%
Memory Loss: 9 people, 29.03%
Restless Leg Syndrome (a powerful urge to move your legs): 8 people, 25.81%
Depression: 8 people, 25.81%
Drug Ineffective: 8 people, 25.81%
Fatigue (feeling of tiredness): 8 people, 25.81%
Headache (pain in head): 7 people, 22.58%
Pulse Abnormal: 6 people, 19.35%
Neuropathy Peripheral (surface nerve damage): 6 people, 19.35%
Blood Pressure Abnormal: 5 people, 16.13%

What are the existing conditions these people have? *

Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 8 people, 25.81%
Cataplexy (loss of muscle tone accompanied by full conscious awareness): 6 people, 19.35%
Muscle Spasms (muscle contraction): 5 people, 16.13%
Pain: 4 people, 12.90%
Fibromyalgia (a long-term condition which causes pain all over the body): 4 people, 12.90%
Stress And Anxiety: 3 people, 9.68%
Heart Palpitations (feelings or sensations that your heart is pounding or racing): 2 people, 6.45%
Back Injury: 2 people, 6.45%
Depression: 2 people, 6.45%
Asthma: 2 people, 6.45%

* Approximation only. Some reports may have incomplete information.

Do you take Amrix and have Insomnia?

- Check whether Insomnia 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 Amrix:

Amrix (1,130 reports)

Insomnia treatments and more:

Insomnia (438,050 reports)

Browse all side effects of Amrix:

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 Insomnia:

Insomnia (3,118 drugs)

Browse all the conditions that are associated with Insomnia:

Insomnia (5,156 conditions)

How the study uses the data?

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