U-No-Poo is a product of Weasleys' Wizard Wheezes that causes constipation in the unknowing taker. The pills can be mashed up and mixed with food or drink. The product was advertised in the main window of the shop in the summer of 1996 in yellow writing and on a purple background.
Harry Potter once noticed that it seemed as if his classmates had overdosed on U-No-Poo as they practised trying to cast spells non-verbally, as they were purple in the face and straining as they tried to make magic without speaking.
Behind the scenes
- Harry Potter and the Half-Blood Prince (First appearance)
- Harry Potter and the Half-Blood Prince (film) (Appeared on DVD 2nd-disc Special Feature)
- The Wizarding World of Harry Potter
- LEGO Harry Potter: Years 5-7