Rather than blowing up about it, I came home and did some research. But I was sad to find that
Valtrex is only prescribed
for Simplex I, Simplex II and Zosters. So I asked her about it (via instant message - is that bad?). She said she gets cold sores sometimes, and the Valtrex gets rid of them quickly. Indeed I remembered that the empty bottle was for a seven-day dosage. But in all of the times that I've seen her, I never noticed a cold sore.