The present invention provides methods of treating chronic pain, in particular, neuropathic pain, chronic visceral pain, chronic inflammatory pain and pain resulting from fibromyalgia syndrome, in a subject by administering Dimebon™ antihistamine agent (DETCD) to the subject. The invention also provides methods of treating chronic pain in a subject by administering a combination of DETCD and one or more additional agents, such as an antidepressant agent, an anticonvulsant agent, an antiarrhythmic agent, an anesthetic agent, an NMDA antagonist, or a narcotic.
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