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Risperdal and Anoxic encephalopathy - a phase IV clinical study of FDA data

Summary:

Anoxic encephalopathy is reported as a side effect among people who take Risperdal (risperidone), especially for people who are female, 20-29 old, have been taking the drug for 10+ years also take Neurontin, and have Sleep disorder.

The phase IV clinical study analyzes which people have Anoxic encephalopathy when taking Risperdal. It is created by eHealthMe based on reports of 126,253 people who have side effects when taking Risperdal from the FDA, and is updated regularly.

What is Risperdal?

Risperdal has active ingredients of risperidone. It is often used in bipolar disorder. eHealthMe is studying from 127,729 Risperdal users. Check the latest studies of Risperdal.

What is Anoxic encephalopathy?

Anoxic encephalopathy (brain damage due to lack of oxygen) is found to be associated with 194 drugs and 367 conditions by eHealthMe. Check the latest studies of Anoxic encephalopathy.

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, 28, 2026

126,253 people reported to have side effects when taking Risperdal.
Among them, 18 people (0.01%) have Anoxic encephalopathy.

Could Risperdal cause Anoxic encephalopathy?

Among these 18 people:

How long have people been on Risperdal when they have Anoxic encephalopathy? *

  • < 1 month: 0.0 %
  • 1 - 6 months: 0.0 %
  • 6 - 12 months: 0.0 %
  • 1 - 2 years: 0.0 %
  • 2 - 5 years: 0.0 %
  • 5 - 10 years: 0.0 %
  • 10+ years: 100 %

What is the gender of people who have Anoxic encephalopathy when taking Risperdal? *

  • female: 55.56 %
  • male: 44.44 %

What is the age of people who have Anoxic encephalopathy when taking Risperdal? *

  • 0-1: 0.0 %
  • 2-9: 6.25 %
  • 10-19: 0.0 %
  • 20-29: 62.5 %
  • 30-39: 0.0 %
  • 40-49: 6.25 %
  • 50-59: 25.0 %
  • 60+: 0.0 %

What are other drugs people take besides Risperdal? *

  1. Neurontin: 6 people, 33.33%
  2. Effexor Xr: 5 people, 27.78%
  3. Metadate Cd: 4 people, 22.22%
  4. Lexapro: 3 people, 16.67%
  5. Seroquel: 3 people, 16.67%
  6. Ritalin: 3 people, 16.67%
  7. Celexa: 2 people, 11.11%
  8. Clarinex: 2 people, 11.11%
  9. Lorazepam: 2 people, 11.11%
  10. Abilify: 2 people, 11.11%

What are other side effects people have besides Anoxic encephalopathy? *

  1. Respiratory Acidosis (respiratory failure or ventilatory failure, causes the ph of blood and other bodily fluids to decrease): 9 people, 50.00%
  2. Cardiac Arrest: 7 people, 38.89%
  3. Pain: 6 people, 33.33%
  4. Stress And Anxiety: 6 people, 33.33%
  5. Pneumomediastinum (air is present in the mediastinum): 6 people, 33.33%
  6. Pneumonia Aspiration (bronchopneumonia that develops due to the entrance of foreign materials into the bronchial tree): 6 people, 33.33%
  7. Completed Suicide (act of taking one's own life): 6 people, 33.33%
  8. Cardio-Respiratory Arrest (sudden dysfunction of heart and lungs): 5 people, 27.78%
  9. Ventricular Fibrillation (abnormally irregular heart rhythm): 5 people, 27.78%
  10. Loss Of Consciousness: 5 people, 27.78%

What are the existing conditions these people have? *

  1. Sleep Disorder: 5 people, 27.78%
  2. Depression: 4 people, 22.22%
  3. Attention Deficit Hyperactivity Disorder (a chronic condition including attention difficulty, hyperactivity, and impulsiveness): 4 people, 22.22%
  4. Psychotic Disorder: 3 people, 16.67%
  5. Pain: 2 people, 11.11%
  6. Insomnia (sleeplessness): 2 people, 11.11%
  7. Self-Injurious Ideation: 1 person, 5.56%
  8. Schizoaffective Disorder (a mental disorder characterized by disordered thought): 1 person, 5.56%
  9. Mood Swings (an extreme or rapid change in mood): 1 person, 5.56%
  10. Convulsion (muscles contract and relax rapidly and repeatedly, resulting in an uncontrolled shaking of the body): 1 person, 5.56%

* Approximation only. Some reports may have incomplete information.

Do you take Risperdal and have Anoxic encephalopathy?

- Check whether Anoxic encephalopathy 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 Risperdal:

Anoxic encephalopathy treatments and more:

How severe was Anoxic encephalopathy and when was it recovered:

Expand to all the drugs that have ingredients of risperidone:

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 Risperdal:

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 Anoxic encephalopathy:

Browse all the conditions that are associated with Anoxic encephalopathy:

Related publications that referenced our studies

How the study uses the data?

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

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