- Neuropathic pain of peripheral origin as a consequence of either post-herpetic
neuralgia or post-traumatic neuropathic pain
- Well-defined skin area of mechanical allodynia to punctate (von Frey filament) stimuli
- Pain intensity score of ≥ 4/10 for von Frey filament-evoked allodynia at the skin area
- Patients who have undergone neurolytic or neurosurgical therapy, including skin
excisions, for neuropathic pain
- Patients who have trigeminal neuralgia, central pain, chronic radiculopathy, or
peripheral neuropathy of non-mechanical or unknown origin
- Patients with any other co-existing pain which cannot be differentiated from the
neuropathic pain of peripheral origin