"Yeah, I'm frustrated. I'm allowed to be frustrated even though I'm not infected," Epiphany snapped. After that she stood still for a moment and took a couple of deep breaths, trying to calm down a bit. She wasn't as good at her job when she was pissed off so it was best she keep that at bay for the time being.
Once those few seconds passed she picked up a second vial and turned to take the couple of steps towards John. "You're only taking one right now, but it'll only last a couple hours since it's trying to fight a demon based thing and not just some sort of chemical imbalance. The second is for once the first one wears off, not for now. We don't need you going and getting yourself genuinely sick right now, do we?" With that, Epiphany held the vials out for him to take. "I will deck you if you take both now. You've been warned."
In all honesty, Epiphany had missed bickering with John while she was in town but he wasn't, but she would be hard pressed to admit that out loud. Especially when he was currently being all insane with envy. And, alright. She'd actually missed him, not just the bickering with him, but she wasn't about to admit that out loud either. Not without prompting, at least.