Preventing or counteracting sleep or drowsiness; the opposite of a soporific.
From 'anti-' (against) plus 'soporific,' derived from Latin 'sopor' (sleep) plus 'ficus' (producing). This medical/pharmaceutical term is the exact opposite of sleep-inducing substances.
Caffeine is the world's most famous antisoporific drug—so common we forget it's literally a chemical designed to prevent the sleep-inducing effect, making it the opposite of sleeping pills in every way.
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