Hair-Raising Potion

• Type: Potion
• Effect: Causes the drinker's hair to stand straight up on end.
• Known Ingredients:
  • Rat tails
  • Puffer-fish eyes (video game)
• Characteristics: The final appearance of the finished potion is unknown. However, during the brewing process, an error such as adding too many rat tails will cause the mixture to emit thick, green smoke.

This potion is first mentioned in Harry Potter's second year. Following a chaotic Duelling Club meeting, Professor Snape sarcastically suggests to Gilderoy Lockhart that Harry might be in need of a Hair-Raising Potion, implying it is a remedy for someone who has had a fright. The narcissistic Lockhart misinterprets this as a genuine offer of help and eagerly agrees. The Hair-Raising Potion is a standard part of the Hogwarts Potions curriculum, brewed by fourth-year students. During one such lesson, Harry, distracted by the presence of journalist Rita Skeeter, adds too many rat tails to the cauldron he shares with Ron Weasley. This mistake causes their potion to give off clouds of green smoke, earning him the ire of Professor Snape.

The Hair-Raising Potion appears in the mobile game Harry Potter: Hogwarts Mystery. According to the game, its recipe requires two puffer-fish eyes and two rat tails to brew. (video game)