Overview PT001 MDI Versus Spiriva® in Patients With Moderate to Severe COPD Status: Completed Trial end date: 2012-08-01 Target enrollment: Participant gender: Summary The overall objective of this study is to determine an optimal dose and dosing regimen of PT001 MDI for further evaluation in later stage studies. Phase: Phase 2 Details Lead Sponsor: Pearl Therapeutics, Inc.Treatments: BromidesTiotropium Bromide