Sugammadex is the first selective relaxant binding agent and reverses rocuronium-induced neuromuscular block. A case is reported in which a patient accidentally received a high dose of sugammadex (40 mg kg(-1)) to reverse a rocuronium-induced (1.2 mg kg(-1)) profound neuromuscular block. A fast and efficient recovery from profound neuromuscular block was achieved and no adverse events or other safety concerns were reported.