Adderall XR works with a unique delivery system specially designed to release its active ingredients slowly. Inside each of the capsules are beads coated with the medicine that dissolve upon ingestion at different rates. This extended-release mechanism enables patients to realize a consistent therapeutic effect over 8 to 12 hours, thus avoiding multiple daytime dosing. The sustained action is very important for individuals requiring symptom control so that they may participate in work, school, or daily activities without having to remember midday doses.