An atonic seizure is a sudden loss of muscle tone in the muscles that
hold the body and head upright.
The seizure occurs without warning and usually
causes the person to fall down.
Some atonic seizures may be more
limited, only causing the person's head to drop for a moment.
Atonic seizures are fairly uncommon and occur mostly in people with
Lennox-Gastaut syndrome. This is a severe form of generalized epilepsy that begins
in early childhood. (Children with Lennox-Gastaut syndrome may also have
If you are a woman who has epilepsy, there are some important things you should know before using birth control or planning a pregnancy.
Any birth control that is safe for women, in general, is safe for women with epilepsy. However, having epilepsy -- and some treatments for the condition -- can make some forms of birth control less effective. Also, because anti-seizure medications for epilepsy can increase the risk of birth defects, it's important to plan pregnancy carefully.