Comparative Pharmacology
Head-to-head clinical analysis: MODAFINIL versus MYDAYIS.
Peer-Reviewed Evidence
Head-to-head clinical analysis: MODAFINIL versus MYDAYIS.
MODAFINIL vs MYDAYIS
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
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.
MYDAYIS is a fixed-dose combination of amphetamine and dextroamphetamine, which are non-catecholamine sympathomimetic amines with CNS stimulant activity. The mechanism of action in ADHD is not fully elucidated, but they block the reuptake of norepinephrine and dopamine into the presynaptic neuron and increase their release into the extraneuronal space.
200 mg orally once daily in the morning.
Oral, 12.5 mg or 25 mg 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 elimination half-life is approximately 15 hours (range 10–30 hours). This supports once-daily dosing for sustained wakefulness.
12 hours for d-methylphenidate; 3-4 hours for l-methylphenidate; clinical context: d-isomer provides extended coverage; l-isomer contributes minimal activity
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%.
Renal (approx. 90% as unchanged drug and 10% as inactive metabolites); fecal <5%
Category C
Category C
CNS Stimulant
CNS Stimulant
"The metabolism of Erythromycin can be decreased when combined with Modafinil."