Anticonvulsants, also known as antiepileptic or antiseizure medications, are a group of drugs used mainly to treat epileptic seizures by reducing abnormal and excessive electrical activity in the brain. They are also used for conditions such as bipolar disorder, borderline personality disorder, and neuropathic pain because they can help stabilize mood and nerve activity. These drugs work by suppressing the uncontrolled firing of neurons and preventing seizures from spreading within the brain.
Anticonvulsants act through different mechanisms, but many of them work by blocking sodium channels or enhancing the action of the neurotransmitter GABA, which helps calm brain activity. Some also affect calcium channels, SV2A proteins, and other targets involved in nerve signaling. By influencing these pathways, they reduce the release of excitatory chemicals like glutamate, which is often increased during seizures. Although some anticonvulsants have shown potential to prevent or slow the development of epilepsy in animal studies, no medication has yet been proven to do this in humans.