My difficult child started this drug a couple of years ago. Even the slightest dose knocks him out cold, so it went from an attempt to being an everyday medication to slow him down a little to being what we use PRN for "emergency management" or the nights he doesn't sleep. It also tends to make our difficult child more aggressive the day after, so we use it minimally. A few others here have mentioned the same reaction, but for the most part, I think it works well for a lot of kiddos.