Be weary of substances that attack viruses in vitro, they often do that, but will not attack the virus outside of that controlled environment. Many, if not most, of the so-called miracle-drug type of remedies that are sold, particularly online, that kills viruses of all sorts, do so in vitro. Notice the big bucks associated with most of them, too.
In my opinion, we are better off either spending our $ on drugs like Acyclovir and Valtrex if we can get them, or, if not, on vitamins (particularly Vitamin C) to boost the immune system, fresh fruits and veggies, and meditation and/or relaxation. Looking through a natural remedy text, seems that even Lysine (1 g 3 times a day) along with Vitamin C and lemon balm for lesions would be a better bet than Monolaurin any day...and a lot cheaper.
Reading The Truth About Herpes (by Dr. Stephen Sacks) and Intuitive Healing (by Dr. Judith Orloff) have convinced me that healing can also be a thing of the mind, as well as from a drug...though they often have to go hand in hand. And, as I know, and as Dr. Orloff points out, medical doctors don't always know how to treat a patient, but patients still need to be very careful of seeking expensive miracle cures that take advantage of a person's pain and vulnerability. I went through the oil of oregano period and I finally realized that it was too expensive for the result I was getting.