In order to model or simulate the time course of drug absorption of sustained release drugs from microbeads, I need an adequate description of the rate of release of drug from the dissolution of the carrier beads. In particular Microtrol beads. I do not need to know the bead composition or technology, only the parameters (values for Adderall XR would be nice) to simulate the "pulsatile-like" drug exposure to gi mucosa. References? Values?