Overview Study in Healthy Volunteers to Investigate the Effects of Rifampin on the Pharmacokinetics of NKTR-118 Status: Completed Trial end date: 2012-05-01 Target enrollment: Participant gender: Summary Study in healthy volunteers to investigate the effects of Rifampin on the Pharmacokinetics of NKTR-118. Phase: Phase 1 Details Lead Sponsor: AstraZenecaTreatments: NaloxegolRifampin