Abstract
Purpose: This single-dose pivotal study evaluated the pharmacokinetics of amphetamine extended-release oral suspension (AMPH EROS) under fasted and fed conditions and the relative bioavailability of AMPH EROS and immediate-release mixed amphetamine salts (IR MAS) in adults. Methods: This open-label, randomized, three-period, three-treatment, six-sequence crossover study enrolled 30 healthy adult participants who were randomly assigned to receive either 1 dose of AMPH EROS 18.8 mg under fed or fasted conditions or 30 mg of IR MAS under fasted conditions. Participants crossed over with a 7-day washout period between each of the three periods. Plasma samples were measured for Cmax, AUC0-t, AUC0-5, AUC5-t, and AUC0-∞ for comparative bioavailability. Results: The geometric mean ratios for Cmax, AUC0-t, and AUC0-∞ were within the 90% confidence limits [80.0%, 125.0%] for comparable bioavailability. There was no food effect for AMPH EROS. Both the AMPH EROS and IR MAS formulations were generally well tolerated with no serious adverse events reported. Conclusions: The bioavailability of a single dose of AMPH EROS was comparable to two 15 mg doses of IR MAS, given 4 hr apart, with no food effect or safety concerns observed.
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