- Famciclovir for the treatment of acute herpes zoster: effects on acute disease and postherpetic neuralgia. A randomized, double-blind, placebo-controlled trial. Collaborative Famciclovir Herpes Zoster Study Group. Tyring, S., Barbarash, R.A., Nahlik, J.E., Cunningham, A., Marley, J., Heng, M., Jones, T., Rea, T., Boon, R., Saltzman, R. Ann. Intern. Med. (1995)