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Dosage & How-To
Strengths, splitting and timing explained in plain English, with a doctor in the loop.
Armodafinil 150 mg dosage explained from the US Nuvigil label: the doses for sleep apnea, narcolepsy and shift work, when 250 mg is used, liver and age adjustments, and tablet strengths.
How long does armodafinil last? The Nuvigil label's 15-hour half-life, 2-hour peak, food delay and 7-day steady state, explained with clear examples, plus what that means for sleep.
Modafinil 300 mg vs 200 mg: label dosing, what studies found about higher doses, side effects, sleep, and why 200 mg is the standard. Not medical advice.
Can modafinil be taken twice a day? What the US Provigil label and Medication Guide say about dose timing, why a second dose matters for sleep, and what to ask your prescriber.
Which sleep disorders is modafinil approved for in the US? Narcolepsy, obstructive sleep apnea and shift work disorder, how each is dosed on the FDA label, and what it doesn't treat.
How long does modafinil take to kick in? The Provigil label's 2-4 hour peak, the 1-hour food delay, why the shift-work dose is taken an hour early, and what changes it for you.
What's the best time to take Provigil (modafinil)? The US label's morning and pre-shift timing, how food and half-life affect it, and what to ask your doctor if sleep suffers.