The Effectiveness and Tolerability of Fentanyl Matrix in Chronic Non-cancer Pain; Assessment of Patient's Pain Treatment Goal Achievement

Inclusion Criteria: * Complain of chronic non-cancer pain that persists for \>= 3 months * Pain inadequately controlled by previous treatment with narcotic analgesics (opium or opium-like compounds with potent analgesic effects, eg, tramadol, codeine, morphine, oxycodone) * Women must be postmenopausal, surgically sterile, abstinent, or practicing an effective method of birth control if they have childbearing potential * Male patients who agree to use a method of birth control and not to donate sperm for 1 month after the last dose of the study drug * A written informed consent for study participation Exclusion Criteria: * Experience of treatment with Fentanyl matrix within the past 4 weeks * No previous experience of use of narcotic analgesics * Past or current history of alcohol or drug abuse * Cannot use transdermal analgesics due to skin disorder * Have serious psychiatric disorder and cannot complete overall study procedures and questionnaire in the judgment of the investigator