This form of asthma can lead to respiratory infections if left untreated. If you have cough variant asthma, you might experience sleep disruption because you wake up coughing, or you may struggle with exercise because of the condition. Another indication of CVA is that over-the-counter cough medications tend to be ineffective, which means that even if you suppress the cough momentarily, it comes back quickly. Cough variant asthma can affect people of all ages but is more common in children and young adults, according to Denise Pate, M.D., an internal medicine physician and medical director with Medical Offices of Manhattan in New York City. Read the article.