Flexeril and Pupil fixed - a phase IV clinical study of FDA data

Summary:

Pupil fixed is reported as a side effect among people who take Flexeril (cyclobenzaprine hydrochloride), especially for people who are male, 40-49 old, also take Ultram, and have Insomnia.

The phase IV clinical study analyzes which people have Pupil fixed when taking Flexeril. It is created by eHealthMe based on reports of 34,789 people who have side effects when taking Flexeril from the FDA, and is updated regularly.

What is Flexeril?

Flexeril has active ingredients of cyclobenzaprine hydrochloride. It is often used in muscle spasms. eHealthMe is studying from 38,308 Flexeril users. Check the latest studies of Flexeril.

What is Pupil fixed?

Pupil fixed is found to be associated with 290 drugs and 500 conditions by eHealthMe. Check the latest studies of Pupil fixed.

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, 31, 2026

34,789 people reported to have side effects when taking Flexeril.
Among them, 21 people (0.06%) have Pupil fixed.

Among these 21 people:

What is the gender of people who have Pupil fixed when taking Flexeril? *

female: 38.1 %
male: 61.9 %

What is the age of people who have Pupil fixed when taking Flexeril? *

What are other drugs people take besides Flexeril? *

What are other side effects people have besides Pupil fixed? *

Cardiac Arrest: 16 people, 76.19%
Respiratory Acidosis (respiratory failure or ventilatory failure, causes the ph of blood and other bodily fluids to decrease): 14 people, 66.67%
Breathing - Slowed Or Stopped: 13 people, 61.90%
Sinus Tachycardia (a heart rhythm with elevated rate of impulses originating from the sinoatrial node): 12 people, 57.14%
Dyspnea (difficult or laboured breathing): 12 people, 57.14%
Hypothermia (body temperature drops below the required temperature for normal metabolism and body functions): 12 people, 57.14%
Head Injury: 12 people, 57.14%
Weakness: 11 people, 52.38%
Drowning (process of experiencing respiratory impairment from submersion/immersion in liquid): 11 people, 52.38%
Pain In Extremity: 11 people, 52.38%

What are the existing conditions these people have? *

Insomnia (sleeplessness): 11 people, 52.38%
Back Disorder: 6 people, 28.57%
Relapsing-Remitting Multiple Sclerosis (reoccurrence of an inflammatory disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged): 2 people, 9.52%
Chronic Myeloid Leukaemia (long lasting type of cancer that starts in the blood-forming cells of the bone marrow and invades the blood): 2 people, 9.52%
Renal Cell Carcinoma (a kidney cancer): 1 person, 4.76%
Metastases To Bone (cancer spreads to bone): 1 person, 4.76%
Arthritis (form of joint disorder that involves inflammation of one or more joints): 1 person, 4.76%

* Approximation only. Some reports may have incomplete information.

Do you take Flexeril and have Pupil fixed?

- Check whether Pupil fixed 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 Flexeril:

Flexeril (38,308 reports)

Pupil fixed treatments and more:

Pupil fixed (2,644 reports)

Browse all side effects of Flexeril:

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 Pupil fixed:

Pupil fixed (290 drugs)

Browse all the conditions that are associated with Pupil fixed:

Pupil fixed (500 conditions)

How the study uses the data?

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