Sirius helped by sliding a hand under Remus' head as Hemingway had done earlier. He put the vial to the others lips and tipped it back slowly, allowing the potion to slip into Remus' mouth. He was careful to make sure the other didn't choke, letting him take all of the potion before grabbing the glass.
"Here, Moony, water. Take a few drinks of this and then try to rest, okay? You need to rest up, and hopefully tomorrow we can go home."