"Which means keeping an extra dose with you. And both of us learning how to administer it." Because, yeah, Jason's not going to be leaving Barry to deal with this alone. And if that means learning how to stick a needle in Barry so that he doesn't go stupid dhampir on people, so be it. "And I'm sure they're still going to be working on it, see if they can find a way to make it less painful."

Because, yeah, Jason doesn't really like the idea of Barry in pain. Even if it passes fast enough.