Comparative Pharmacology
Head-to-head clinical analysis: ADDERALL 15 versus ADDERALL XR 10.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ADDERALL 15 versus ADDERALL XR 10.
ADDERALL 15 vs ADDERALL XR 10
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Adderall 15 is a combination of amphetamine and dextroamphetamine, which increase synaptic concentrations of norepinephrine and dopamine by inhibiting their reuptake and promoting their release from presynaptic terminals.
Adderall XR 10 contains a mixture of amphetamine salts, which are central nervous system stimulants. The dextroamphetamine and levoamphetamine components increase synaptic concentrations of dopamine and norepinephrine by inhibiting their reuptake and promoting their release from presynaptic terminals. This action leads to enhanced neurotransmission in the prefrontal cortex and other brain regions involved in attention and executive function.
10-20 mg orally once daily in the morning; may increase by 5-10 mg weekly; maximum 40 mg/day.
10 mg orally once daily in the morning; maximum dose 40 mg/day.
None Documented
None Documented
Mean terminal half-life: d-amphetamine 10 h, l-amphetamine 13 h (range 9-14 h); for ADDERALL 15 (3:1 mix), effective half-life ~11 h; clinical context: dosing interval typically QD-BID.
Dexamphetamine: 10-13 hours in adults (children: 6-8 hours); levoamphetamine: 13-16 hours; clinically, steady-state achieved in approximately 3 days, with twice-daily dosing maintaining therapeutic levels
Primarily renal (90% as unchanged drug and metabolites; ~30% unchanged, 40% as 4-hydroxyamphetamine and conjugates, 20% as other metabolites); minimal biliary/fecal elimination (<3%).
Renal (approximately 30-40% as unchanged amphetamine, remainder as metabolites, including deaminated and oxidized products; urinary pH-dependent elimination: acidic pH increases renal clearance, alkaline pH decreases renal clearance; negligible biliary/fecal elimination)
Category C
Category C
CNS Stimulant
CNS Stimulant