A method of flowing a medicament comprising dry powder using gas, including preparing a medicament capsule with designated inflow and outflow apertures, introducing a volume of a gas to within a medicament capsule according to one or more release conditions, and releasing a therapeutically effective amount of said powder using said gas. In some embodiments, the medicament capsule apertures are prepared and/or gas delivered to it so that deagglomeration potentially occurs largely within the energetic flow conditions of the capsule, without significant trapping of residual powder by structures such as aperture edge irregularities.