It is my understanding that acyclovir, which I have taken,
does not
KILL the herpes virus. It prevents it from multiplying which allows the body the opportunity to fight the virus and heal. It is effective when the rash, cold sore, vesicle is visible (virus is active) and can be used as a suppression dosing. The double vision may be cranial nerve 6 involvement, and from what I have been told (I have CN6,7 and 8) time is what helps heal the nerves.