Apparently, 100x caffeine tablets (which, according to the label are "sports nutrition"). Purchased via Amazon at 01:32 a couple of days ago, when I swear I was asleep. Also in my recently viewed items, from around at that time: the caffeinated version of the energy drink I already own, and in my browser history: the nutrition lists for both. On the plus side, sleep!Katie had enough common sense to check she was purchasing the correct dosage; however, she's also buying industrial quantities of caffeine again, and I thought she'd grown out of such behaviour…