The first time he delayed about a day or two because he didn't previously know about Zanfel and it took some calls to learn about it and find out where to buy it. He followed the directions and suppressed a fairly major outbreak.
The second time, he had a pretty minor exposure and immediately started applying the little bit left in the original tube. When he went to buy more, he decided to try the cheaper generic (looks like even that has gone up a lot!). About a year later he got another (moderate) dose of PO and immediately started the generic. Seemed to work just as well as the name brand.
Sorry to learn it isn't having the same curative effect on you.
DancesWithKnives