Botox and Encephalitis - a phase IV clinical study of FDA data

Summary:

Encephalitis is reported as a side effect among people who take Botox (botulinum toxin type a), especially for people who are female, 50-59 old, have been taking the drug for < 1 month also take Depo-Medrol, and have Eyelid twitch.

The phase IV clinical study analyzes which people have Encephalitis when taking Botox. It is created by eHealthMe based on reports of 69,984 people who have side effects when taking Botox from the FDA, and is updated regularly.

What is Botox?

Botox has active ingredients of botulinum toxin type a. It is often used in migraine. eHealthMe is studying from 70,512 Botox users. Check the latest studies of Botox.

What is Encephalitis?

Encephalitis (inflammation of the brain) is found to be associated with 670 drugs and 842 conditions by eHealthMe. Check the latest studies of Encephalitis.

On Apr, 21, 2026

69,984 people reported to have side effects when taking Botox.
Among them, 21 people (0.03%) have Encephalitis.

Among these 21 people:

How long have people been on Botox when they have Encephalitis? *

What is the gender of people who have Encephalitis when taking Botox? *

female: 95.24 %
male: 4.76 %

What is the age of people who have Encephalitis when taking Botox? *

What are other drugs people take besides Botox? *

Mysoline: 5 people, 23.81%
Depo-Medrol: 5 people, 23.81%
Vitamin B12: 1 person, 4.76%
Aimovig: 1 person, 4.76%

What are other side effects people have besides Encephalitis? *

Weakness: 13 people, 61.90%
Nausea And Vomiting: 13 people, 61.90%
Confusional State: 13 people, 61.90%
Cognitive Disorder (mental health disorders affects learning, memory, perception, and problem solving): 12 people, 57.14%
Headache (pain in head): 12 people, 57.14%
Rashes (redness): 12 people, 57.14%
Burning Sensation: 12 people, 57.14%
Hair Loss: 10 people, 47.62%
Fatigue (feeling of tiredness): 8 people, 38.10%
Feeding Disorder (when children refuse to eat certain food groups): 8 people, 38.10%

What are the existing conditions these people have? *

Eyelid Twitch (spontaneous and uncontrolled spasms of the muscles): 8 people, 38.10%
Torticollis (a twisted neck in which the head is tipped to one side, while the chin is turned to the other): 6 people, 28.57%
Tremor (trembling or shaking movements in one or more parts of your body): 5 people, 23.81%
Pain: 5 people, 23.81%
Muscle Spasticity (tight or stiff muscles and an inability to control those muscles): 3 people, 14.29%
Skin Wrinkling (wrinkle on skin): 1 person, 4.76%
Neck Pain: 1 person, 4.76%
Muscle Contracture (a permanent shortening of a muscle): 1 person, 4.76%

* Approximation only. Some reports may have incomplete information.

Do you take Botox and have Encephalitis?

- Check whether Encephalitis 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 Botox:

Botox (70,512 reports)

Encephalitis treatments and more:

Encephalitis (9,372 reports)

Browse all side effects of Botox:

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 Encephalitis:

Encephalitis (670 drugs)

Browse all the conditions that are associated with Encephalitis:

Encephalitis (842 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on botulinum toxin type a (the active ingredients of Botox) and Botox (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.