Prohiper Tablet. Methylphenidate sold under the brand name Ritalin among others is a stimulant drug used to treat attention deficithyperactivity disorder (ADHD) and narcolepsyIt is a firstline medication for ADHD It may be taken by mouth or applied to the skin and different formulations have varying durations of effect It is also used recreationally as a performanceenhancer and/or as a.