Onset of Action and Pharmacokinetics of Generic Adderall XR

Comparison to Other Formulations

• Methylphenidate immediate-release begins working within 30 minutes, providing rapid symptom control 1
• Methylphenidate sustained-release (SR-20) has a delayed onset of 90 minutes, compared to the faster onset of Adderall XR 2

Administration and Absorption

• Morning administration of Adderall XR is essential to minimize sleep disturbances, as the 12-hour duration could interfere with nighttime sleep if taken later in the day 3