Like humans, dogs and cats can suffer from asthma and bronchitis. Flovent HFA is used to treat asthma and helps to prevent symptoms of asthma. Flovent HFA contains a medicine called fluticasone propionate, which is a synthetic corticosteriod. Corticosteroids are nautral substances found in the body to help fight inflammation. Flovent helps reduce airway inflammation, an underlying cause of asthma symptoms.