Focalin^® (dexmethylphenidate hydrochloride) is a prescription medication that is approved to treat attention deficit hyperactivity disorder (ADHD). Although Focalin is a stimulant, it causes a calming effect. Focalin can help improve the behavior of children and teenagers with ADHD. Among other things, it can help these children and teenagers to sit still and pay attention in the classroom. The medicine comes in a tablet form that is taken by mouth twice a day. It does not matter if you take Focalin with or without food. If Focalin bothers your stomach, try taking it with food. A few of the conditions that you should let your healthcare provider know about before taking Focalin include high blood pressure, seizures, and glaucoma.