Wide-Awake Potion is used by Miss Hardbroom. It presumably keeps to user awake. Wide-Awake Potion is seen in the episode where Millie is a frog, in 'It's a Frog's Life'; we see the bottle in Miss Hardbroom's handbag. "A handkerchief, a bottle of Wide Awake Potion and a notepad and pen/pencil tied with an elastic band." are the contents of Miss Hardbroom's bag.