·Adderall is an immediate-release formulation, meaning it starts working within 30 to 60 minutes after ingestion and typically lasts for about 4 to 6 hours. It is designed to help improve focus, attention, and impulse control in individuals with ADHD. When taken as prescribed by a healthcare professional, Adderall 20mg can be effective in managing the symptoms of ADHD. It helps individuals with ADHD to concentrate, stay organized, and control impulsive behaviors.