“ Caffeine (20 and 40 mg/kg) reduced the time spent in social interaction and this effect was antagonized by chlordiazepoxide , U-43,465 and DL-propranolol, but not by flumazenil, 2-chloroadenosine or clonidine.”
“It is suggested that the reversal of caffeine's effects by chordiazepoxide may have been "functional," i.e., merely a cancellation of two opposite effects.”