Methods of dry powder inhalation
First Claim
1. A method for inhalation of a dry powder drug, comprising the steps of:
- a) providing a dry powder drug composition having a drug particle size of from about 1-7 microns and mass median aerodynamic diameter of the delivered aerosol of from about 3 to 6 microns;
b) loading the dry powder drug composition into an inhaler which is generally flow rate independent, and with the inhaler having an inspiration flow resistance of about 0.12 to 0.21 (cm H2 O)1/2) over the range of about 10-60 L/min;
c) inhaling the drug composition from the inhaler with an inspiration flow rate of about 15-60 L/min, resulting in a delivery efficiency measured by respirable fraction of at least 20%.
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Accused Products
Abstract
A method for inhalation of a dry powder drug includes the steps of providing a dry powder drug composition having a drug particle size of from about 1-7 microns and a mass median aerodynamic diameter of the delivered aerosol of from about 3.5 to 5.5 microns. This composition is loaded into an inhaler which is generally flow rate independent, and with the inhaler having an inspiration flow resistance of about 0.12 to 0.21 (cmH2 O)1/2 over the range of about 15-60 L/min. The patient inhales the drug composition from the inhaler with an inspiration flow rate of about 15-60 L/min, resulting in a delivery efficiency measured by respirable fraction greater than 20%.
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Citations
12 Claims
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1. A method for inhalation of a dry powder drug, comprising the steps of:
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a) providing a dry powder drug composition having a drug particle size of from about 1-7 microns and mass median aerodynamic diameter of the delivered aerosol of from about 3 to 6 microns; b) loading the dry powder drug composition into an inhaler which is generally flow rate independent, and with the inhaler having an inspiration flow resistance of about 0.12 to 0.21 (cm H2 O)1/2) over the range of about 10-60 L/min; c) inhaling the drug composition from the inhaler with an inspiration flow rate of about 15-60 L/min, resulting in a delivery efficiency measured by respirable fraction of at least 20%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for inhalation of a dry powder drug, comprising the steps of:
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a) providing a dry powder drug composition having a drug particle size of from about 1-7 microns and mass median aerodynamic diameter of the delivered aerosol of from about 3 to 6 microns; b) loading the dry powder drug composition into an inhaler which is generally flow rate independent, and with the inhaler having an inspiration flow resistance of about 0.12 to 0.21 (cm H2 O)1/2) over the range of about 10-60 L/min; c) inhaling the drug composition from the inhaler with an inspiration flow rate of about 15-60 L/min, resulting in a delivery efficiency measured by respirable fraction of at least 20%.
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Specification