Comparative Pharmacology
Head-to-head clinical analysis: ADDERALL 20 versus DEXMETHYLPHENIDATE HYDROCHLORIDE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ADDERALL 20 versus DEXMETHYLPHENIDATE HYDROCHLORIDE.
ADDERALL 20 vs DEXMETHYLPHENIDATE HYDROCHLORIDE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
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.
Dexmethylphenidate is a central nervous system (CNS) stimulant. Its mechanism of action in ADHD is not fully understood, but it is believed to block the reuptake of norepinephrine and dopamine into the presynaptic neuron, increasing their levels in the extraneuronal space.
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).
Initial: 5 mg orally twice daily (morning and noon) with or without food; titrate in increments of 5 mg weekly; maximum 20 mg twice daily (40 mg/day).
None Documented
None Documented
d-Amphetamine: 10-13h; l-Amphetamine: 13-16h. Clinical steady-state reached in 2-3 days.
2-4 hours (immediate-release); 4-5 hours (extended-release); clinical context: short half-life necessitates multiple daily dosing for immediate-release formulations
Renal: ~90% unchanged; ~10% as deaminated metabolites; fecal <5%.
Renal (78-97% as metabolites and unchanged drug, with approximately 50% as de-esterified metabolites and 30% as unchanged drug)
Category C
Category A/B
CNS Stimulant
CNS Stimulant