 A randomized, prospective study has been carried out; double blind and controlled with placebo to be treated with midazolam. This included 152 patients, randomized into two groups: Group A - 7951.9 patients which received midazolam before the FB, and Group B - 49.1 patients which received placebo. The patients were given a questionaire of 13 questions about different aspects of perception of the procedure after the respiratory endoscopy and another was given to the Bronchoscopist. 