What antiviral do I order from my ENT?

Tomorrow I am going to see my otorrino. I'm going to try asking her for antivirals, but honestly I think she's a bad ENT and she won't give them to me. I will try to get them from my doctor directly, but I have a question. What antiviral do I order? Acyclovir or Valacyclovir? I would also like to know if it should be taken throughout life? I read a lot about the maintenance dose, but I don't know if these people keep taking it or have stopped after a year or two, etc.