A Study of ONO-1110 in Patients With Postherpetic Neuralgia

Inclusion Criteria: * Japanese (both sexes) * Age (at the time of informed consent): 18 years and older * Outpatient * Patients with persistent pain ≥3 months (90 days) after the onset of herpes zoster * Patients who are considered capable of understanding the study procedures and completing the pain diary and questionnaires appropriately by the investigator (sub-investigator) Exclusion Criteria: * Patients who previously underwent neurodestruction or neurosurgical therapy for PHN * Patients with pain other than PHN that may affect assessments in this study * Patients with any skin condition related to the site of herpes zoster that may affect assessments in this study * Patients with a past history of or concurrent neurologic diseases that may affect assessments in this study * Patients with concurrent psychiatric diseases that may affect assessments in this study