What Dosage Of Aciclovir Should Be Taken For Treatment Of Cold Sore?

Hi! I am have developed a cold soar over the night, so I just bought some Aciclovir to fight it. The pharmacist told me to take two pills of 0.1 g five times per day, but last time I took it (in Canada, not China where I am now) I was given higher doses (5 pills, twice a day). Should I be worried?