Comparative Pharmacology
Head-to-head clinical analysis: FOCALIN XR versus MODAFINIL.
Peer-Reviewed Evidence
Head-to-head clinical analysis: FOCALIN XR versus MODAFINIL.
FOCALIN XR vs MODAFINIL
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Focalin XR (dexmethylphenidate) is a central nervous system stimulant. It blocks the reuptake of norepinephrine and dopamine into presynaptic neurons, increasing their concentrations in the synaptic cleft. The d-threo enantiomer is pharmacologically active.
The precise mechanism of action is unknown. Modafinil is a wakefulness-promoting agent that may have direct or indirect effects on dopamine, norepinephrine, serotonin, GABA, glutamate, and orexin systems. It binds to the dopamine transporter and inhibits dopamine reuptake.
Initial 20 mg orally once daily; may increase in 10-20 mg increments at weekly intervals; maximum 60 mg/day.
200 mg orally once daily in the morning.
None Documented
None Documented
Clinical Note
moderateArmodafinil + Estrone sulfate
"The serum concentration of Estrone sulfate can be decreased when it is combined with Armodafinil."
Clinical Note
moderateModafinil + Estrone sulfate
"The serum concentration of Estrone sulfate can be decreased when it is combined with Modafinil."
Clinical Note
moderateModafinil + Sulfisoxazole
"The metabolism of Sulfisoxazole can be decreased when combined with Modafinil."
Clinical Note
moderateModafinil + Erythromycin
Terminal half-life: 2-3 hours for immediate-release; 6-8 hours for extended-release (FOCALIN XR)
Terminal elimination half-life is approximately 15 hours (range 10–30 hours). This supports once-daily dosing for sustained wakefulness.
Renal (approximately 90% as unchanged drug and metabolites)
Primarily renal (as metabolites and unchanged drug); approximately 80% of the dose is recovered in urine, with less than 10% as unchanged modafinil. Fecal excretion accounts for less than 1%.
Category C
Category C
CNS Stimulant
CNS Stimulant
"The metabolism of Erythromycin can be decreased when combined with Modafinil."