In Pathophysiology of asthma
three main events occurred i.e. Bronchial smooth muscle
constriction , Mucous plug formation & Inflammation . to relieve the inflammation steroids
are used . steroid inhalation (Rota-haler with space-haler /Inhaler or Nabuliser) has very less side effect as compare to systemic steroids but the pt. who is on steroid therapy should withdrawal it in tapering manner.