. "Any of a variety of types of chronic pain can be prevented or alleviated without concomitant sedation by an ??-2A/??-1A selective agonist of the invention including, but not limited to, neuropathic pain such as neuropathic pain associated with diabetic neuropathy or post-herpetic neuralgia; chronic pain associated with cancer; post-operative pain; allodynic pain such as fibromyalgic pain; chronic" . . .