Xenazine and Trismus - a phase IV clinical study of FDA data

Summary:

Trismus is reported as a side effect among people who take Xenazine (tetrabenazine), especially for people who are female, 50-59 old, have been taking the drug for 6 - 12 months also take Ambien, and have Dyskinesia.

The phase IV clinical study analyzes which people have Trismus when taking Xenazine. It is created by eHealthMe based on reports of 7,291 people who have side effects when taking Xenazine from the FDA, and is updated regularly.

What is Xenazine?

Xenazine has active ingredients of tetrabenazine. eHealthMe is studying from 7,308 Xenazine users. Check the latest studies of Xenazine.

What is Trismus?

Trismus (reduced opening of the jaws) is found to be associated with 592 drugs and 764 conditions by eHealthMe. Check the latest studies of Trismus.

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, 30, 2026

7,291 people reported to have side effects when taking Xenazine.
Among them, 11 people (0.15%) have Trismus.

Among these 11 people:

How long have people been on Xenazine when they have Trismus? *

What is the gender of people who have Trismus when taking Xenazine? *

female: 81.82 %
male: 18.18 %

What is the age of people who have Trismus when taking Xenazine? *

What are other drugs people take besides Xenazine? *

Lisinopril: 3 people, 27.27%
Ativan: 3 people, 27.27%
Ambien: 3 people, 27.27%

What are other side effects people have besides Trismus? *

Agitation (state of anxiety or nervous excitement): 4 people, 36.36%
Blood Pressure Abnormal: 3 people, 27.27%
Dry Mouth: 3 people, 27.27%
Eyes - Bulging (swelling of eyes): 3 people, 27.27%
Herpes Zoster: 2 people, 18.18%
Drug Administration Error: 2 people, 18.18%
Fatigue (feeling of tiredness): 2 people, 18.18%
Feeling Cold: 2 people, 18.18%
Hiatal Hernia (hernia resulting from the protrusion of part of the stomach through the diaphragm): 2 people, 18.18%
Tongue Disorder (disease of tongue): 2 people, 18.18%

What are the existing conditions these people have? *

Dyskinesia (abnormality or impairment of voluntary movement): 4 people, 36.36%
Tardive Dyskinesia (a disorder that involves involuntary movements): 1 person, 9.09%
Movement - Uncontrolled Or Slow: 1 person, 9.09%

* Approximation only. Some reports may have incomplete information.

Do you take Xenazine and have Trismus?

- Check whether Trismus 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 Xenazine:

Xenazine (7,308 reports)

Trismus treatments and more:

Trismus (6,560 reports)

Browse all side effects of Xenazine:

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 Trismus:

Trismus (592 drugs)

Browse all the conditions that are associated with Trismus:

Trismus (764 conditions)

How the study uses the data?

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