Comparative Pharmacology
Head-to-head clinical analysis: ADDERALL XR 15 versus AZSTARYS.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ADDERALL XR 15 versus AZSTARYS.
ADDERALL XR 15 vs AZSTARYS
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
ADDERALL XR contains a mixture of amphetamine salts, including dextroamphetamine and levoamphetamine. The mechanism of action involves increasing synaptic levels of dopamine and norepinephrine by inhibiting their reuptake and enhancing their release from presynaptic terminals, leading to CNS stimulation.
AZSTARYS is a prodrug of dexmethylphenidate, a central nervous system stimulant. The exact mechanism of action in attention deficit hyperactivity disorder (ADHD) is unknown, but it is thought to block the reuptake of norepinephrine and dopamine into the presynaptic neuron, increasing their levels in the extraneuronal space.
Oral, 20-60 mg once daily in the morning; initial dose 20 mg once daily, titrated by 10-20 mg weekly based on tolerability and efficacy.
Initial: 39.2 mg oral once daily in the morning; titrate weekly by 19.6 mg increments as needed; maximum dose: 78.4 mg once daily.
None Documented
None Documented
The terminal elimination half-life of amphetamine in adults is approximately 10-13 hours; in children, it is slightly shorter (6-8 hours). For the l-amphetamine isomer, the half-life is 9-11 hours. The extended-release formulation provides a prolonged duration of effect due to a biphasic release profile.
Serdexmethylphenidate: 1.5 hours; dexmethylphenidate: 3.5 hours. The terminal half-life of total dexmethylphenidate after AZSTARYS is approximately 6.5 hours, supporting once-daily dosing.
Renal: approximately 90% of a dose is excreted in urine, with about 30% as unchanged amphetamine and the remainder as metabolites including deaminated and oxidized products; fecal excretion accounts for less than 10%.
Renal: 90% (primarily as metabolites, with 50-70% as the major metabolite (-)-phensuximide glucuronide). Fecal: <5%.
Category C
Category C
CNS Stimulant
CNS Stimulant