Methylphenidate is used to treat attention disorders (attention deficit hyperactivity disorder, or ADHD) as part of a total treatment plan including psychological, educational and social measures. This medication is also used to treat patients with narcolepsy (a disorder of sleep regulation). When this medication is used to treat ADHD, patients may find they have increased attention, decreased impulsiveness, and decreased hyperactivity (see also Notes section). This medication is a mild stimulant that works by affecting the levels of chemicals (neurotransmitters) in the nervous medication should not be used to treat simple fatigue This section contains uses of this drug that are not listed in the approved professional labeling for the drug but that may be prescribed by your health care professional. Use this drug for a condition that is listed in this section only if it has been so prescribed by your health care medication may also be used for treating depression in certain cases.