Should I take herpes suppression drugs every day, or should I take medication only when I have flare-ups?

I recently found out I have Type 1 herpes (HSV-1), although it affects my genitals and not my mouth. I'm trying to figure out treatment options and which is best for me. I know some people take medication every day, and some take it only when they feel an outbreak coming on. Anyone have any insight as to the pros and cons of each method? Thanks!