My doc just put me on Famvir as she said my HHV-6 is reactivated, but from what I've read online, I'm confused about whether that is the case. I was tested using Em Pepper labs. Here is result: 3.14 AU/ML IgG positive at titer 1:160 they tested a 2 fold dilution from 1:20 to 1:640 I don't understand what that all means and cannot find anywhere that explains this in simple language online. Also, she put me on Famvir and I am having tight breathing even from 1/4 of a mini dose. She said Valtrex won't work as well and I'll need much more. Famvir has lactose in it and I think that may be the problem. Does anyone have experience with this? Thanks.