When i had first outbreak my doctor pescribed me Valacyclovir 300mg, two time a day for 7 days. Its been a month i again had a outbreak, It was far less mild than the first one. As soon as it got better , just yesterday i again had a small ulcer again, ... So i went to Pharmacy and they didn;t had any 500mg valcyclovir so i bought 300mg again as the doctor pescribed first time. Is it low dosage? I am confused why doctor game me 300mg as its written in initial outbreak dosage is 1000mg .... I checked so many pharmacy in jut got 300mg... do i have any choices or i continue 300mg...