Tonic-clonic seizure

Overview

A tonic-clonic (grand mal) seizure involves a loss of consciousness and violent muscle contractions. It's usually caused by epilepsy, but may have other triggers, such as extremely low blood sugar, high fever, or a stroke.

Treatments

Many people will have only one such seizure. Others may need daily medications to control and prevent such seizures.

Last Updated Jun 13, 2017


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