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Phenytoin and Electroencephalogram abnormal - a phase IV clinical study of FDA data

Summary:

Electroencephalogram abnormal is reported as a side effect among people who take Phenytoin (phenytoin), especially for people who are female, 30-39 old, have been taking the drug for < 1 month also take Carbamazepine, and have Status epilepticus.

The phase IV clinical study analyzes which people have Electroencephalogram abnormal when taking Phenytoin. It is created by eHealthMe based on reports of 15,464 people who have side effects when taking Phenytoin from the FDA, and is updated regularly.

What is Phenytoin?

Phenytoin has active ingredients of phenytoin. It is often used in epilepsy. eHealthMe is studying from 15,753 Phenytoin users. Check the latest studies of Phenytoin.

What is Electroencephalogram abnormal?

Electroencephalogram abnormal is found to be associated with 597 drugs and 750 conditions by eHealthMe. Check the latest studies of Electroencephalogram abnormal.

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 Sep, 02, 2026

15,464 people reported to have side effects when taking Phenytoin.
Among them, 87 people (0.56%) have Electroencephalogram abnormal.

Could Phenytoin cause Electroencephalogram abnormal?

Among these 87 people:

How long have people been on Phenytoin when they have Electroencephalogram abnormal? *

  • < 1 month: 66.67 %
  • 1 - 6 months: 0.0 %
  • 6 - 12 months: 33.33 %
  • 1 - 2 years: 0.0 %
  • 2 - 5 years: 0.0 %
  • 5 - 10 years: 0.0 %
  • 10+ years: 0.0 %

What is the gender of people who have Electroencephalogram abnormal when taking Phenytoin? *

  • female: 56.63 %
  • male: 43.37 %

What is the age of people who have Electroencephalogram abnormal when taking Phenytoin? *

  • 0-1: 5.26 %
  • 2-9: 11.84 %
  • 10-19: 17.11 %
  • 20-29: 11.84 %
  • 30-39: 19.74 %
  • 40-49: 7.89 %
  • 50-59: 9.21 %
  • 60+: 17.11 %

What are other drugs people take besides Phenytoin? *

  1. Carbamazepine: 19 people, 21.84%
  2. Valproate Sodium: 14 people, 16.09%
  3. Clonazepam: 11 people, 12.64%
  4. Diazepam: 11 people, 12.64%
  5. Levetiracetam: 9 people, 10.34%
  6. Valproic Acid: 9 people, 10.34%
  7. Propofol: 9 people, 10.34%
  8. Gabapentin: 7 people, 8.05%
  9. Lorazepam: 7 people, 8.05%
  10. Magnesium Sulfate: 6 people, 6.90%

What are other side effects people have besides Electroencephalogram abnormal? *

  1. Status Epilepticus (a life-threatening condition in which the brain is in a state of persistent seizure): 23 people, 26.44%
  2. Fatigue (feeling of tiredness): 12 people, 13.79%
  3. Drug Ineffective: 11 people, 12.64%
  4. Confusion: 11 people, 12.64%
  5. Convulsion (muscles contract and relax rapidly and repeatedly, resulting in an uncontrolled shaking of the body): 10 people, 11.49%
  6. Grand Mal Convulsion (a type of generalized seizure that affects the entire brain): 10 people, 11.49%
  7. Speech Impairment (Adult) (inability to speak (adult)): 10 people, 11.49%
  8. Loss Of Consciousness: 10 people, 11.49%
  9. Drug Level Decreased: 9 people, 10.34%
  10. Depressed Level Of Consciousness: 8 people, 9.20%

What are the existing conditions these people have? *

  1. Status Epilepticus (a life-threatening condition in which the brain is in a state of persistent seizure): 12 people, 13.79%
  2. Convulsion (muscles contract and relax rapidly and repeatedly, resulting in an uncontrolled shaking of the body): 8 people, 9.20%
  3. Bipolar Disorder (mood disorder): 6 people, 6.90%
  4. Hypotension (abnormally low blood pressure): 5 people, 5.75%
  5. Partial Seizures (seizures which affect only a part of the brain at onset): 4 people, 4.60%
  6. Partial Seizures With Secondary Generalisation (partial seizure may spread within the brain, a process known as secondary generalization): 3 people, 3.45%
  7. Hemiplegia (paralysis of one side of the body): 3 people, 3.45%
  8. Grand Mal Convulsion (a type of generalized seizure that affects the entire brain): 3 people, 3.45%
  9. Urinary Tract Infection: 2 people, 2.30%
  10. Encephalitis Herpes (inflammation of the brain due to herpes infection): 2 people, 2.30%

* Approximation only. Some reports may have incomplete information.

Do you take Phenytoin and have Electroencephalogram abnormal?

- Check whether Electroencephalogram abnormal 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 Phenytoin:

Electroencephalogram abnormal treatments and more:

How severe was Electroencephalogram abnormal and when was it recovered:

Expand to all the drugs that have ingredients of phenytoin:

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 Phenytoin:

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 Electroencephalogram abnormal:

Browse all the conditions that are associated with Electroencephalogram abnormal:

Related publications that referenced our studies

  • Wandalkar P, Daswani BR, Pandit PT, Ghongane BB, "A case of Phenytoin toxicity", INTERNATIONAL JOURNAL OF ADVANCES IN PHARMACY, BIOLOGY AND CHEMISTRY, 2014 Jan .
  • Wandalkar P, Daswani BR, Pandit PT, Ghongane BB, "A case of Phenytoin toxicity", INTERNATIONAL JOURNAL OF ADVANCES IN PHARMACY, BIOLOGY AND CHEMISTRY, 2014 Jan .

How the study uses the data?

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