Comparative Pharmacology
Head-to-head clinical analysis: DEXMETHYLPHENIDATE HYDROCHLORIDE versus JORNAY PM.
Peer-Reviewed Evidence
Head-to-head clinical analysis: DEXMETHYLPHENIDATE HYDROCHLORIDE versus JORNAY PM.
DEXMETHYLPHENIDATE HYDROCHLORIDE vs JORNAY PM
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
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.
Methylphenidate is a central nervous system (CNS) stimulant. The mode of action in attention deficit hyperactivity disorder (ADHD) is not fully understood, but methylphenidate is thought to block the reuptake of norepinephrine and dopamine into the presynaptic neuron, increasing the levels of these neurotransmitters in the extraneuronal space.
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).
Initial: 20 mg orally once daily at bedtime; increase by 20 mg weekly as needed; max 100 mg/day.
None Documented
None Documented
2-4 hours (immediate-release); 4-5 hours (extended-release); clinical context: short half-life necessitates multiple daily dosing for immediate-release formulations
The terminal elimination half-life of methylphenidate following JORNAY PM administration is approximately 4-5 hours. This relatively short half-life necessitates the delayed-release/extended-release formulation to provide a prolonged duration of effect.
Renal (78-97% as metabolites and unchanged drug, with approximately 50% as de-esterified metabolites and 30% as unchanged drug)
Methylphenidate and its metabolites are primarily excreted in urine (approximately 90%) as metabolites (mainly ritalinic acid) with about 2% unchanged parent drug. Fecal excretion accounts for <1%.
Category A/B
Category C
CNS Stimulant
CNS Stimulant