The Impact of Inhaled Furosemide and Perorally Administered Levodropropizine on Dyspnea in Patients With Respiratory Diseases

The goal of this monocentric double blinded cross over trial is to evaluate safety and tolerability of inhaled furosemide in patients with pulmonary diseases and dyspnea. The main question\[s\] it aims to answer are: * is inhaled furosemide safe and well tolerated? * is inhaled furosemide capable of dyspnea suppression and is there any additive effect of levodropropizine Participants will be given: * inhaled furosemide or placebo in double blinded cross over manner. Dyspnea severity and vital functions will be measured, adverse reactions monitored * all participants will receive levodropropizine open label. Dyspnea severity and vital functions will be measured, adverse reactions monitored