Comparative Pharmacology
Head-to-head clinical analysis: METADATE CD versus METHYLIN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: METADATE CD versus METHYLIN.
METADATE CD vs METHYLIN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Methylphenidate is a central nervous system (CNS) stimulant. It blocks the reuptake of norepinephrine and dopamine into the presynaptic neuron, increasing their levels in the extraneuronal space. The precise mechanism for treating ADHD is not fully understood.
Methylphenidate is a central nervous system stimulant. It blocks the reuptake of dopamine and norepinephrine into presynaptic neurons, increasing their concentrations in the synaptic cleft.
20-60 mg orally once daily in the morning
10 mg orally twice daily, administered 4-6 hours apart; doses may be adjusted in 5-10 mg increments weekly up to 60 mg/day.
None Documented
None Documented
Terminal elimination half-life: 6.8 hours (range 4.5-10.3 hours) for methylphenidate; clinical context: supports twice-daily dosing regimen
2-4 hours (short elimination half-life, requiring multiple daily dosing; immediate-release: 3-4 hours, extended-release: 3-6 hours)
Renal: 78-97% as metabolites (primarily ritalinic acid), unchanged drug <1%; fecal: <2%
Renal: 90% (mainly as metabolites, 30-50% as unchanged drug); fecal: <1%
Category C
Category C
CNS Stimulant
CNS Stimulant