"Short-acting hypnotics are the most addictive," warns Chien. "These drugs can also cause anterograde amnesia. At excessive dosages, they become long-acting and cause drowsiness on waking. And even a single pill can be misused as a date-rape drug," he says.
冰山的一角要小心的是，「短效型的安眠藥反倒成癮性最高，」簡俊生警告，這類藥品會產生「前行性失憶症」（是一種暫時性失憶），一旦過量，短效變成長效，醒後仍昏沈倦怠；且一粒眠若被不當使用，則成了「迷姦藥」。