Trimethadione is used to control absence seizures (petit mal; a
type of seizure in which there is a very short loss of awareness
during which the person may stare straight ahead or blink his
eyes and does not respond to others) when other medications will
not work. Trimethadione is in a class of medications called
anticonvulsants. It works by reducing abnormal electrical
activity in the brain. Trimethadione comes as a chewable tablet
to take by mouth. It is usually taken three or four times a day.
Take trimethadione at around the same times every day. Follow
the directions on your prescription label carefully, and ask
your doctor or pharmacist to explain any part you do not
understand. Take trimethadione exactly as directed. Do not take
more or less of it or take it more often than prescribed by your
doctor. The chewable tablets may be chewed or swallowed whole.
Trimethadione may help to control your condition but will not
cure it. Continue to take trimethadione even if you feel well.
Do not stop taking trime