It’s hard to say exactly how a medication will work in any one particular body. For many people, taking Acyclovir or other suppressive therapy daily does prevent herpes outbreaks. However, it will ultimately depend upon the strength of your immune system versus the strength of the virus. You can help keep your immune system strong by getting enough sleep, eating nutritional food, feeling emotionally supported, and exercising regularly. As always, chat with a nurse at Teen Clinic if you have questions about how herpes works. Best of luck!