If you feel an OB coming around the mouth area, should eat more lysine foods, avoid stress and apply honey or OTC creams as soon as possible. For the question about sex after a OB, you should wait until your OB is healed completely, time depends on your body, as long as you feel free, sex is okay, but remeber to wear condoms every time you've sex. Acyclovir is the common antiviral med for herpes, but I don't take this med. I applied Prosurx through people's suggestions, it helped me treat herpes well and control further OB