"Feodore?" She raised an eyebrow and turned to Drago. "Did someone slip him a youth potion?" She looked at the kid. "You don't feel sick, that's good, it isn't a bad concussion, no need to spend the night in the hospital wing, but it is a concussion, what you need is rest and fluids and..." She pulled out a vial from her pocket.... the note mentioned a concussion... "this. Take it with your first drink. If you start throwing up, you tell Miss Green, or Mr. Jones, the Slytherin prefects, they'll take you to the hospital wind. Ok?"