Phospholipid-based powders for inhalation
First Claim
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1. A method for inhalation of a dry powder drug comprising:
- providing a dry powder drug composition comprising particles comprising a lipid matrix and a particle size of 1-30 microns, mass median aerodynamic diameter of less than 5 microns, and bulk density of less than 0.5 g/cm3;
loading the composition into a passive dry powder inhaler; and
inhaling the drug composition from the inhaler resulting in an emitted dose substantially independent of device resistance and lung deposition substantially independent of inhalation flow rate.
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Abstract
Methods for inhalation are provided. The formulations for inhalation are engineered to be highly dispersible and provide rapid absorption of the active agent so delivered, as well as substantially independent emitted doses and lung deposition as functions of device resistance and inspiratory flow rates, respectively. The present invention also provides reductions in the flow rate dependence in lung deposition and improvements in patient reproducibility.
174 Citations
20 Claims
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1. A method for inhalation of a dry powder drug comprising:
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providing a dry powder drug composition comprising particles comprising a lipid matrix and a particle size of 1-30 microns, mass median aerodynamic diameter of less than 5 microns, and bulk density of less than 0.5 g/cm3;
loading the composition into a passive dry powder inhaler; and
inhaling the drug composition from the inhaler resulting in an emitted dose substantially independent of device resistance and lung deposition substantially independent of inhalation flow rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for inhalation of a dry powder drug comprising:
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providing a dry powder drug composition comprising a hydrophobic active agent, said composition comprising particles comprising a lipid matrix and a particle size of 1-30 microns, mass median aerodynamic diameter of less than 5 microns, and bulk density of less than 0.5 g/cm3;
loading the composition into a passive dry powder inhaler;
inhaling the drug composition from the inhaler in order to achieve a Tmax within 15 minutes of the inhalation. - View Dependent Claims (17, 18, 19, 20)
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Specification