Overview A Study in Healthy Young Men to Look at What Drives the Cardiovascular Effects After Dosing With Mirabegron. Status: Completed Trial end date: 2009-11-01 Target enrollment: Participant gender: Summary To explore what is driving heart-rate increases after dosing with mirabegron. Subjects will be given a beta-blocker at the same time as mirabegron. Phase: Phase 1 Details Lead Sponsor: Astellas Pharma IncTreatments: BisoprololMirabegronPropranolol