I take daily antivirals because I have an immune deficiency that allowed me to have non-stop shingles outbreaks for 30 years (herpes Zoster) before starting the antivirals. The virus wreaked havoc on my nervous system. I take 400mg of Acyclovir 2x a day to prevent shingles outbreaks. I cut back to 1x a day for the last two years in an overall attempt to cut back on pharmaceuticals, and my neuropathy symptoms increased exponentially. I just started back on 2x daily, and my symptoms are easing. I hadn't connected the virus and the antivirals with the neuropathy until I consulted with my infectious disease doctor recently, and he agreed increasing my dose could help with the neuropathy symptoms.