The purpose of this study is to determine the efficacy and safety of chronic treatment with inhaled dry powder mannitol in subjects with cystic fibrosis. Previous studies have demonstrated an improvement in lung function related to small airways obstruction and a significant improvement in respiratory symptoms and quality of life after a 2 week treatment with mannitol. This current study seeks to support these early findings and to extend the evidence to support its use as a mucoactive therapy in cystic fibrosis. In particular, the hypothesis that enhanced mucus clearance will improve the lung function and clinical presentation in this population, will be investigated. We also hypothesize that enhanced mucociliary clearance will result in a sustained reduction in mucus load, thus providing less opportunity for bacteria to proliferate, affording a reduction in antibiotic use and hospitalizations. The initial 6 month blinded phase will be followed with an additional 6 months of open label treatment.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
340
400mg BD for 6 months followed by a 6 month open label period
placebo BD for 6 months
Childrens Hospital at Westmead
Sydney, New South Wales, Australia
Sydney Childrens Hospital
Sydney, New South Wales, Australia
Royal Brisbane Children's Hospital
Brisbane, Queensland, Australia
The Prince Charles Hospital
Brisbane, Queensland, Australia
Royal Adelaide Hospital
Adelaide, South Australia, Australia
Royal Childrens Hospital
Melbourne, Victoria, Australia
Beaumont Hospital
Dublin, Ireland
National Children's Hospital
Dublin, Ireland
Our Lady's Hospital for Sick Children
Dublin, Ireland
St Vincent's University Hospital
Dublin, Ireland
...and 19 more locations
To determine the effects of 400 mg twice-daily administration of IDPM on FEV1 in patients with CF compared to control
Time frame: 6 months
To determine the effects of 400 mg twice-daily administration of IDPM on FEV1 in patients with CF on existing RhDNase treatment compared to control. (key objective)
Time frame: 6 months
Reduces pulmonary exacerbations in those taking RhDNase as a sub-group and in the total cohort (key objective)
Time frame: 6 months / 12 months
Improves quality of life (key objective)
Time frame: 6 months
Reduces days on IV antibiotics, rescue oral or inhaled antibiotics
Time frame: 6 months / 12 months
Reduces days in hospital due to pulmonary exacerbations
Time frame: 6 months / 12 months
Improves other measures of lung function
Time frame: 6 months
Demonstrates an appropriate safety profile (adverse events, haematology, biochemistry, change in bronchodilator response, sputum microbiology, physical examination)
Time frame: 6 months / 12 months
Reduces hospital and community care costs
Time frame: 6 months / 12 months
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