Overview Regular Use Effect of Inhaled Ipratropium Bromide on Airway Responsiveness to Methacholine in Well-controlled Asthma Status: Completed Trial end date: 2020-03-13 Target enrollment: Participant gender: Summary Study is looking at the development of tolerance to methacholine following regular use of ipratropium bromide in mild asthmatics. Phase: Phase 4 Details Lead Sponsor: University of SaskatchewanTreatments: BromidesIpratropiumMethacholine Chloride