A Study of JNS020QD in Patients With Chronic Pain

During weeks 1-3, initial doses of 0.84 mg, 1.7 mg, 3.4 mg, or 5 mg can be increased until individual optimal dose (up to maximum 20.1 mg) is determined. The optimal dose will be administered during the maintenance period (1 week), followed by a long-term treatment (48 weeks) period, where the dose will be adjusted (escalated or reduced) in consideration of the efficacy of the study, and the condition of adverse events. The patches are applied on the skin and exchanged daily (every 24 hours) for consecutive 52 weeks.