the mucolytic activity of acetylcysteine ( nac ) was evaluated in a double-blind , placebo controlled , clinical trial performed in three pneumology centres and involving a total of 215 patients with the following diagnoses : 84 acute bronchitis , 95 superinfections of chronic bronchitis , 36 complicated bronchitis in patients with severe chronic respiratory insufficiency .
C0001047
acetylcysteine
C0006277
bronchitis