A compound exerts a strong analgesic effect against pain, in particular, neuropathic pain and/or fibromyalgia syndrome. A cyclic amine derivative represented by general formula or a pharmacologically acceptable salt thereofA method of treating neuropathic pain includes administering a therapeutically effective amount of the cyclic amine derivative to a mammal. A method of treating fibromyalgia syndrome includes administering a therapeutically effective amount of the cyclic amine derivative to a mammal.
