...A few hours is too long. [She has to drag the words out of her mouth. A few minutes? Then it's a matter of evasion and containment. And even then it's an incredible risk. But hours... so much can be done in hours.] I would guess that to poison someone with that kind of precision, you would need an accurate guess of their body weight, their overall constitution, and any complicating health factors, like you do with medicine.

[She has records in the clinic. It's not how she wants to use them--she takes the trust and confidence people have in her seriously--but this is life-and-death.]