10
Participants
Start Date
January 31, 1998
Primary Completion Date
February 28, 2013
Study Completion Date
March 31, 2013
Methadone
patients with post-herpetic neuralgia take methadone or placebo to treat pain symptoms.
Placebo
patients with post-herpetic neuralgia take placebo to treat the pain symptoms.
University of Sao Paulo
OTHER