Trial With Bronchipret and Sinupret to Evaluate Acceleration of Mucociliary Clearance (MCC)

Inclusion Criteria: 1. Volunteers who have given their signed declaration of consent and have signed the data protection declaration 2. Male or female volunteers 25 - 40 years 3. Current smokers (5-20 cigarettes per day since 5 years at least) 4. Ability to taste sweetness of saccharin 5. Perception of sweetness within 30 minutes after placement of saccharin behind nasal valve Exclusion Criteria: 1. Ciliary dyskinesia 2. Cystic fibrosis 3. COPD/emphysema 4. Asthma 5. Chronic rhinosinusitis 6. Acute respiratory tract infection within the last 6 weeks prior to enrolment 7. Septal or sinus surgery 8. Symptomatic allergic rhinitis 9. Known allergic rhinitis 10. Treatment with not-permitted previous or concomitant therapy 11. History of snuff consumption for longer than 1 month or intranasal consumption of recreational drugs such as cocaine or heroin for longer than 1 month 12. Any disease or condition that might affect the safety of the subject during the trial, according to the investigator's judgement