Study to Investigate the Pharmacokinetics of CHF 6001 DPI Administered Via Nexthaler® Device or the Capsule for Oral Inhalation Via Aerolizer® Device

Inclusion Criteria: 1. Subject's written informed consent obtained prior to any study-related procedure 2. Able to understand the study procedures, the risks involved and ability to be trained to use the devices correctly 3. Able to generate sufficient PIF 4. Male and female subjects aged 18 to 55 years inclusive 5. Body mass index (BMI) within the range of 18 to 30 kg/m2 inclusive 6. Non- or ex-smokers who smoked \< 5 pack years 7. Good physical and mental status 8. Lung function within normal limits 9. Results of laboratory tests within the normal ranges 10. adequate contraception Exclusion Criteria: 1. Blood donation (equal or more than 450 ml) or blood loss less than 8 weeks before inhalation of the study medication 2. Pregnant or lactating women 3. Positive HIV1 or HIV2 serology 4. Positive results from the Hepatitis serology which indicates acute or chronic Hepatitis B or Hepatitis C 5. Unsuitable veins for repeated venipuncture 6. History of substance abuse or drug abuse within 12 months prior to screening visit or with a positive urine drug screen 7. Subjects who have a positive urine test for cotinine at screening or at randomization 8. Clinically relevant abnormal laboratory values at screening suggesting an unknown disease and requiring further clinical investigation 9. Clinically relevant and uncontrolled hepatic, gastrointestinal, endocrine, metabolic, neurologic, or psychiatric disorder that may interfere with successful completion of this protocol 10. Subjects who have clinically significant cardiovascular condition according to investigator's judgment 11. An abnormal 12-lead ECG 12. Subjects whose electrocardiogram (12-lead ECG) shows QTcF \> 450 ms for males or QTcF \> 470 ms for females 13. Diastolic Blood Pressure \> 90 mmHg and/or Systolic Blood Pressure \> 140 mmHg 14. Participation in another clinical trial where investigation drug was received less than 8 weeks prior to screening 15. History of hypersensitivity to any of the excipients contained in the formulations used in the trial 16. Any drug treatment, including prescribed or OTC medicines as well as vitamins, homeopathic remedies etc, taken in the 14 days (2 months for enzyme-inducing or enzyme-inhibiting drugs e.g., glucocorticoids, phenobarbital) before the screening visit and likely to receive these treatments until the end of the study procedures with the exception of occasional paracetamol (maximum 2 g per day with a maximum of 10 g per 14 days for mild non-excluding conditions), hormonal contraceptives and hormonal replacement treatment for post-menopausal women 17. Treatment within the previous 3 months before the screening visit and likely to receive these treatments until the end of the study procedures in the last treatment period with biologic drugs and with any drug known to have a well-defined potential for hepatotoxicity (e.g. isoniazide, nimesulide, ketoconazole) 18. Subjects who refuse to respect the required study restrictions related to alcohol, xanthine, grapefruit, food and water intake and strenuous activities 19. Heavy caffeine drinker