Muggles' Guide to Harry Potter/Magic/Dreamless Sleep Potion

Overview
Dreamless Sleep Potion is a complex potion first mentioned by Severus Snape and later by Horace Slughorn. Both Potions Masters used this potion as an example of how powerful potions could be.

Professor Dumbledore recommended that Harry be given the potion after he confronted Voldemort at the end of the Triwizard Tournament.