If you ask for it, get a couple of doses (I think its 2 pills taken 2 times) cause it has a pretty high co-pay (
no generic). My doc gave me 3 doses, says next time start the
Valtrex at the first twinge. He cross-checked it in his PDR with Peg and Riba, ok to take for mouth sores, there are some caveats if taking it for genital sores during tx.
Valtrex works well and surprisingly fast. Good luck.