Overview Ziconotide Effectiveness and Safety Trial in Patients With Chronic Severe Pain Status: Completed Trial end date: 1969-12-31 Target enrollment: Participant gender: Summary The purpose of this open-label study is to give chronic severe pain patients with existing intrathecal pump systems access to ziconotide. Phase: Phase 3 Details Lead Sponsor: Elan PharmaceuticalsTreatments: omega-ConotoxinsZiconotide