Getting there is good enough for Face, that means he'll get there - it means that maybe they'l be going back to normal soon. Well, their normal at least.

"You need to stay up with me a little longer, okay? Finish your soup and water. After this tape you can go back to sleep."

He's still scared that he fucked up the dosage or grabbed the wrong vial no matter how many times he went over it in his head, he has to make sure it's okay.