Overview A Phase III Clinical Study of KW-2246 Status: Completed Trial end date: 2011-10-01 Target enrollment: Participant gender: Summary This study is designed to assess the safety and efficacy of long-term KW-2246 treatment as rescue medication for breakthrough pain. Phase: Phase 3 Details Lead Sponsor: Kyowa Hakko Kirin Co., LtdKyowa Kirin Co., Ltd.Treatments: Citric AcidFentanyl