"For the pain?" Hermione takes a deep breath, tries to work out whether that's a good idea or not, whether you're supposed to let someone sleep- but that's concussion. Isn't it?

Come on, you've read about this!

"Just a moment," she says, more confidently than she feels; she has to get him to swallow this next potion as well, after all, tipping chin up and trying to make it as easy as possible. "I promise this one's easier to take," she says to the injured man, and then to both of them- "Please. If that's-" She glances down at the man, but he's in no position to make decisions, twisting and gasping from the pain. She looks to Wolfgang again, resealing a vial, her face drawn. "Yes. Do it."