Methylphenidate typically starts to work within 20 to 60 minutes of taking it. The onset time depends on the formulation, with immediate-release forms usually taking about 20 to 30 minutes, while some sources note up to 60 minutes for effect onset. The noticeable improvement in symptoms such as better concentration usually begins within this timeframe once the right dose is found. The full therapeutic effect may take a few weeks to be felt as the dose is adjusted by a doctor. This applies to both adults and children taking methylphenidate for conditions like ADHD.
