cold sores
"Valtrex is fantastic if used correctly for cold sores.  For adults the dose is 2 grams at first symptom of a cold sore, followed by 2 grams 12 hours later.  That's it.  Now the key is getting that first dose right when you feel the first symptom (tingling, burning, swelling etc.)  This medicine has worked great for me and usually prevents the sore from breaking the skin, thus no one even knowing I was getting a cold sore.  Anyone who gets cold sores knows how awful they are and how long they take to heal.  I have not had as much success with acyclovir.

Be sure you always have some Valtrex on hand.  If you wait until you get a cold sore before calling the doctor, it's probably too late, but take it anyway to reduce healing time."