Tonic-clonic Seizure

A tonic-clonic seizure is the classic convulsive episode most people picture when they think of epilepsy. It unfolds in two phases: a brief tonic phase in which muscles stiffen and consciousness is lost, followed by a clonic phase of rhythmic, jerking limb movements lasting one to three minutes. Afterwards, the person typically feels confused, exhausted, or drowsy for up to an hour.

Medicine used to treat Tonic-clonic Seizure

Dilantin

Phenytoin

100mg

Formulated to manage epileptic seizures to alleviate abnormal electrical activity in the brain.

From $0.43 / tablet View

Managing tonic-clonic seizures long-term

Once a person has had more than one unprovoked tonic-clonic seizure, most neurologists begin anticonvulsant therapy. The goal is to suppress abnormal electrical firing in the brain enough to prevent further episodes. Phenytoin is one of the older, well-studied anticonvulsants used for this purpose, working by stabilising voltage-gated sodium channels in nerve membranes. It is often used in acute settings and for longer-term control in patients who tolerate it well. For a broader view of conditions and medicines in this field, see the neurology category.

If someone has a seizure lasting more than five minutes, or has repeated seizures without regaining consciousness, seek emergency help immediately.