Zarontin or otherwise known as Ethosuximide is an anti-epileptic, an old one, that's used for abson seizures. So those are those generalized ones where I stare and zone and don't respond. And it's one of the older medications that have been used to treat this very effectively. So there was a study done a few years ago that compared a bunch of different medications for the treatment of abson seizures and actually this is the one that most people used and was the most efficacious. The biggest side effect with Zarontin is that it can upset your stomach. So some kids we give Tums when they are taking the medication, we make sure that they take the dose after they eat. It's available liquid and it's available in pills for those kids who can swallow pills. So it's a great medication, good for controlling abson seizures, those staring and zoning out episodes. Again the major side effect issue is the stomach problems. If you take it with food it's pretty well tolerated. There is always a small risk of a weight gain. But if they get too much of the medication they can get tired and fatigued. But again a good choice, first line choice for patients with abson seizures.