I started on Valtrex a little over a week ago. I began at 500mg (for 1 week) and have now doubled it to 1000mg/day. I am wondering what dosages people have found effective? I would also like to hear about any symptoms people suffer from while on Valtrex. I have heard about the naseau, something I haven't experienced thus far. I have felt a little rundown and just a little off. It may be something else, but wanted to see what others are experiencing. Thanks.