Safety and Efficacy of PA9159 Inhalation Aerosol for the Treatment of Adult Bronchial Asthma

This study is testing an inhaled medication called PA9159 to see if it safely and effectively treats adults with bronchial asthma. Researchers want to evaluate how well the drug controls asthma symptoms and whether it is a good treatment option. **You may be eligible if...** - You are between 18 and 75 years old - You have been diagnosed with bronchial asthma, either recently or in childhood with symptoms worsening in adulthood - Your lung function tests show moderate airflow limitation (FEV1 between 60% and 85% of expected) - Your breathing significantly improves after using a bronchodilator inhaler, or you have a positive provocation test for asthma - You are willing to sign the informed consent form **You may NOT be eligible if...** - You are unable to use an inhaler correctly - You have other significant lung conditions - You have conditions that would make participation unsafe (specific exclusions were not fully listed) Talk to your doctor to see if this trial is right for you.