Eugeroic = “good arousal." Unique class of drugs (adrafinil, modafinil). Like adaptogens (ginseng), only “stimulate when stimulation is required.” Highs and lows associated with other stimulants (amphetamine, etc) are absent with eugeroics.
For narcolepsy, or off-label for depression, night-shift work, ADHD/ADD...a prodrug, metabolizes to modafinil (Provigil®), resulting in nearly identical pharmacological effects, takes 45-60 minutes to reach active levels in bloodstream.