Inhalation therapy is the best treatment method for treating respiratory disease mainly used for the treatment for lung disease such as asthma and chronic obstructive pulmonary disease (COPD).A vast number of inhalation devices are known to be used for the treatment dating back from 1,500 B.C.to present and today, each device has its specific features and mechanism of drug delivery with a purpose to deliver. Being responsible for the treatment of world respiratory burden of 500 million it needs to comply with regulatory requirement for the approval of their Quality, Safety and Efficacy of the drug product along with its delivery system as per the International standards. Even, with innovation and awareness in the use and variety of benefits in terms of its delivery medication directly to the effected site to the lungs have resulted in great acceptance and growth among the patients. Also, Proper device selection is crucial as per the severity of patients, clinical expectation and results of inhalation therapy. Several studies with higher citations along with demographical observation providing the estimates of their treatment prevalence are the main basis. Where no. of challenges industry is facing and the upcoming trends in the inhalation market is evaluated. Thus, the quality articles with the overview of the market trends are reviewed highlighting the major finding as result.