I woke up with an out break yesterday on my lip and what I usually do is soak a Q-tip with alcohol or hydrogen peroxide to dry out the cold sore, and I also use non prescription creams for cold sores like L-lysine cream or Campho-phenique but I came across Zovirax or Acyclovir ointment on a YouTube video and did more research and called to get a prescription and they prescribed me oral tablets of Acyclovir 400mg and directions say take 1 tablet orally 3 times a day for 10 days. So when I picked up my prescription they didn't explain anything to me so do I stop taking it if my cold sore stops after day 5 or continue till day 10 even though I don't have a cold sore anymore? or am I suppose to take 3 pills every single day of my life? I'm just confused. This has only been my 3rd cold sore I've ever experienced in my life, last year is when I started getting them for the first time so I am fairly new to any of this.