After being on Acyclovir for about 14 months now I continue to have almost daily dizziness although very few severe bouts of vertigo anymore. I contacted Dr Gacek a few weeks ago and he suggested I try Famciclovir since I had already tried Valcyclovir months ago and it messed up my stomach so had to stop. I started Famciclovir yesterday. So far no stomach problem but had a terrible headache (which is rare for me) all day. I'm hoping this is a temporary side affect. I'm praying this will give me that added boost I need to get the type of relief so many on this site get from antivirals. I will also continue with the JOH Regime I've been on for 6 months now. Sharon