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Spiders on drugs and other things you want to know about the world’s favourite psychoactive substance

(Left) A female Araneus diadematus used in drug testing and (right) caffeine tablets
(Left) A female Araneus diadematus used in drug testing and (right) caffeine tablets / Credit: Didier Descouens (Garden Spider), Ragesoss, (Caffeine tablets), Wikimedia Commons