The inhalation product testing is a crucial part of development of orally inhaled drugs as it helps to understand the product characteristics as well as drug-device relationship. The testing also helps in establishing critical quality attributes as well as performance of the formulation along with the device. Inhalation product analysis and testing is required throughout the drug development cycle starting from early stage candidate formulations to device screening, stability studies and commercial batch release. Our inhalation product analysis and testing are carried out in accordance with Good Manufacturing Practices.