This clinical trial is focused on studying a condition known as Refractory or Unexplained Chronic Cough, which is a persistent cough that lasts for a long time without a clear cause or does not respond to usual treatments. The study is testing a new treatment called Taplucainium Inhalation Powder, also known by its code name NOC-110. This medication is taken by inhaling a powder through a device called a Monodose Dry Powder Inhaler. The purpose of the study is to evaluate how effective and safe this treatment is for adults who have this type of chronic cough.
Participants in the study will be randomly assigned to receive either the Taplucainium Inhalation Powder or a placebo, which looks like the treatment but does not contain the active ingredient. The study will last for 28 days, during which participants will take the treatment once daily. The study will test three different dose levels of the medication: 1 mg, 3 mg, and 6 mg. Researchers will monitor how often participants cough over a 24-hour period to see if the treatment reduces cough frequency.
Throughout the study, participants will be asked to report any side effects they experience. The study will also assess changes in how severe the cough feels and the urge to cough, using simple scales and questionnaires. The goal is to determine if Taplucainium Inhalation Powder can help reduce the symptoms of chronic cough and improve the quality of life for those affected by this condition.



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