What is the role of lactose in DPI?
                                
                                
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                                    2 min read                                
                            
                                In many dry powder inhaler (DPI) formulations, lactose can make up over 99% of the powder mixture, acting as an essential excipient. The indispensable role of lactose in DPI is to serve as a carrier, facilitating the transport and dispersion of the tiny, potent drug particles.