Comparative Pharmacology
Head-to-head clinical analysis: ADDERALL 10 versus ADDERALL 20.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ADDERALL 10 versus ADDERALL 20.
ADDERALL 10 vs ADDERALL 20
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Adderall 10 contains a mixture of amphetamine salts (dextroamphetamine and levoamphetamine). Amphetamines are non-catecholamine sympathomimetic amines that promote the release of dopamine and norepinephrine from presynaptic neurons, inhibit their reuptake, and inhibit monoamine oxidase activity, thereby increasing extracellular levels of these neurotransmitters in the central nervous system.
Adderall 20 is a combination of amphetamine and dextroamphetamine, which are central nervous system stimulants. They increase the levels of norepinephrine and dopamine in synaptic clefts by inhibiting their reuptake and promoting their release from presynaptic neurons.
10 mg orally once daily in the morning, with or without food; may increase by 5-10 mg weekly based on tolerability and response; usual effective dose 10-40 mg/day divided into 2-3 doses; maximum 60 mg/day.
Initial: 5 mg orally once or twice daily; may increase by 5 mg increments at weekly intervals. Usual effective dose: 20-40 mg/day divided into 1-2 doses. Maximum: 40 mg/day (immediate-release); 60 mg/day (extended-release).
None Documented
None Documented
Terminal elimination half-life: dextroamphetamine 9-11 hours, levoamphetamine 11-14 hours (Adderall is a mixed salt). In adults, mean half-life ~10 hours; in children, slightly shorter (6-8 hours). Clinical context: steady-state reached in 2-3 days; dosing interval typically 4-6 hours for immediate-release.
d-Amphetamine: 10-13h; l-Amphetamine: 13-16h. Clinical steady-state reached in 2-3 days.
Renal: 70-80% (30-40% as unchanged amphetamine; remainder as deaminated and hydroxylated metabolites). Fecal: minimal (<5%). Biliary: negligible. Urinary pH affects excretion: acidic urine increases elimination, alkaline urine decreases.
Renal: ~90% unchanged; ~10% as deaminated metabolites; fecal <5%.
Category C
Category C
CNS Stimulant
CNS Stimulant