Daytrana™ (methylphenidate patch) is a prescription medicine that comes in the form of a skin patch. The Daytrana patch is used for treating attention deficit hyperactivity disorder (ADHD) in children. Many people find that the skin patch, which can be worn for up to nine hours, is more convenient to use than oral ADHD medications. The Daytrana patch, which works by affecting certain chemicals in the brain, can produce a calming effect in children with ADHD to help them stay focused. Examples of side effects that may occur with the use of Daytrana include loss of appetite, vomiting, weight loss, and insomnia.