Use of Buventol Easyhaler and Bufomix Easyhaler in Methacoline Challenge Testing

The study compares Buventol® Easyhaler® and Bufomix® Easyhaler® to the current standard treatment during methacholine challenge test. The trial will also provide inspiratory flow profile data for Easyhaler inhaler. This trial is designed to provide a further evidence for the use of Easyhaler in diagnostic bronchial challenge tests and on the use of Easyhaler inhaler during obstructive event.