Acyclovir
"Tried this for CS outbreak.  I'll keep it simple and to the point



Pros:

-Works a lot better than any OTC (throw that junk out waste of $)

-Cheap...compared to other drugs

-Fast acting ...even if caught later will still work

-Can stop/reduce symptoms

-Convenient vs any cream

-Side affects nothing like Famvir



Cons:

-Not as good as Famvir(holy grail to knockout cold sores)

-It appears you need to double the dose to really get an affect

-Maybe slight headache

-You need to take a lot, its not just 3 pills and done...

-no advancement in this drug and its been around for how long??  

-Did get a second outbreak while taking...but cleared up quick."