Shoot... I noticed a slight blister on my lip last night and automatically reached for the Zovirax... I didn't put a lot on and it was just the topical application. I forgot to put anything on it this morning and it was only about 5 mins ago I thought to search BB for info on coldsores... there are a few threads on it but all seem to differ and then have some parts in common.

Will try again to get in contact with my Obs office... silly coldsores!