This is a first in human study of ETD002 a new drug being developed for the treatment of cystic fibrosis.The study is a randomised, double-blind, placebo-controlled, interventional study to assess the safety and tolerability of ascending single and repeat doses of inhaled ETD002 in healthy male and female subjects.

Inclusion Criteria:

• Males & females using suitable methods of contraception or females of non-childbearing potential
• Consent to study participation
• Body weight ≥ 50 kg and body mass index within the range 19 - 30 kg/m2
• Vital signs assessments within normal ranges
• Healthy as determined following physical examination at screening visit
• Spirometry readings (FEV1 and FVC) to be ≥ 80% of predicted value

Exclusion Criteria:

• Acute or chronic illness detected at screening visit
• Respiratory tract infection within 4 weeks of the screening visit
• Use of prescription or OTC medication within 14 days of the screening visit
• History of regular alcohol consumption over recommended limits within 6 months of the study, or history/evidence of alcohol or drug abuse
• Smoking or use of tobacco products within 6 months of screening
• Abnormal blood/urine laboratory screening test results
• Current, or history of, allergy that may be contraindicated