N-acetylcysteine in cystic fibrosis and Pseudomonas aeruginosa infection: clinical score, spirometry and ciliary motility.
The effect of peroral N-acetylcysteine (NAC) in patients with cystic fibrosis ( CF) and chronic pulmonary Pseudomonas aeruginosa infection was studied in 52 patients in a double-blind, placebo-controlled, cross-over trial of two, 3 month durations. Active treatment consisted of NAC, 200 mg x 3 daily (patients weighing less than 30 kg) or 400 mg x 2 daily (greater than 30 kg). The effect was evaluated by a subjective clinical score, weight, sputum bacteriology, blood leucocyte count, sedimentation rate, titres of specific antimicrobial antibodies, lung function parameters and measurement of nasal ciliary function in vitro. 31 patients completed the study. No significant differences in lung function or subjective clinical scores were seen between NAC and placebo for the study group as a whole. Patients with peak expiratory flow rate (PEFR) below 70% of predicted normal values showed a satisfactory significant increase in PEFR, forced vital capacity (FVC) and forced expiratory volume in one second (FEV1) during NAC treatment. No effect of NAC on ciliary activity was observed.[1]References
- N-acetylcysteine in cystic fibrosis and Pseudomonas aeruginosa infection: clinical score, spirometry and ciliary motility. Stafanger, G., Koch, C. Eur. Respir. J. (1989) [Pubmed]
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