Dry powder pharmaceutical compositions and methods

Abstract

A method of making a dry powder pharmaceutical composition comprising: providing inactive ingredient particles; providing a micronized active ingredient; mixing the inactive ingredient particles with surface-modified nanoparticles to provide an inactive ingredient comprised of particles having surfaces with the surface-modified nanoparticles deposited on the surfaces; and/or mixing the micronized active ingredient with surface-modified nanoparticles to provide a micronized active ingredient comprised of particles having surfaces with the surface-modified nanoparticles deposited on the surfaces; and then mixing the micronized active ingredient with the inactive ingredient; the dry powder compositions made by the method; a method of delivering medicament to the lungs of a mammal by administering a therapeutic amount of the dry powder pharmaceutical composition, and a dry powder inhalation device comprising a mouth piece, a powder containment system, and the dry powder pharmaceutical composition are disclosed.

1 . A method of making a dry powder pharmaceutical composition comprising:
 providing inactive ingredient particles;   providing a micronized active ingredient;   mixing the inactive ingredient particles with surface-modified nanoparticles to provide an inactive ingredient comprised of particles having surfaces with the surface-modified nanoparticles deposited on the surfaces;   then mixing the micronized active ingredient with the inactive ingredient comprising particles having surfaces with the surface-modified nanoparticles deposited on the surfaces.   
     
     
         2 . (canceled) 
     
     
         3 . The method of making a composition of  claim 1 , further comprising mixing the micronized active ingredient with surface-modified nanoparticles prior to mixing the micronized active ingredient with the inactive ingredient comprising particles having surfaces with the surface-modified nanoparticles deposited on the surfaces. 
     
     
         4 . The method of making a composition of  claim 3 , further comprising dry blending inactive ingredient particles without surface-modified nanoparticles with the inactive ingredient comprised of particles having surfaces with the surface-modified nanoparticles deposited on the surfaces, wherein the dry blending is carried out prior to mixing the micronized active ingredient with the inactive ingredient. 
     
     
         5 - 13 . (canceled) 
     
     
         14 . The method of making a composition of  claim 1 , wherein mixing the inactive ingredient particles with the surface-modified nanoparticles is carried out in a liquid, and then the liquid is removed to provide the inactive ingredient comprised of particles having surfaces with the surface-modified nanoparticles deposited on the surfaces; and wherein the inactive ingredient particles are substantially insoluble in the liquid, and the surface-modified nanoparticles are dispersible in the liquid. 
     
     
         15 . The method of making a composition of  claim 14 , wherein the liquid is removed by spray drying, rotary evaporation, bulk evaporation, or freeze drying. 
     
     
         16 . The method of making a composition of  claim 1 , wherein mixing the active ingredient with the inactive ingredient is carried out by dry blending. 
     
     
         17 . The method of making a composition of  claim 1 , wherein the inactive ingredient is comprised of particles having a mean physical diameter of less than 200 micrometers. 
     
     
         18 . The method of making a composition of  claim 1 , wherein the active ingredient is comprised of particles having a mean aerodynamic diameter of less than 5 micrometers. 
     
     
         19 . The method of making a composition of  claim 18 , wherein the mean physical diameter of the particles comprising the inactive ingredient is at least 10 fold greater than the mean aerodynamic diameter of the particles comprising the active ingredient. 
     
     
         20 . The method of making a composition of  claim 1 , wherein the active ingredient and the inactive ingredient are each present in an amount such that the weight ratio of the amount of active ingredient to the amount of the inactive ingredient is not more than 1:3. 
     
     
         21 . The method of making a composition of  claim 1 , wherein the inactive ingredient is selected from the group consisting of lactose, trehalose, sucrose, mannitol, or a combination thereof. 
     
     
         22 . The method of making a composition of  claim 1 , wherein the active ingredient is selected from the group consisting of antiallergics, antiasthmatics, antiinflammatories, bronchodilators, steroids, anticholinergics, salts thereof, solvates thereof, enantiomers thereof, and a combination thereof 
     
     
         23 . The method of making a composition of  claim 22 , wherein the active ingredient is selected from the group consisting of budesonide, albuterol, formoterol, fluticasone, salmeterol, mometasone, tiotropium, beclomethasone, salts thereof, solvates thereof, enantiomers thereof, and a combination thereof 
     
     
         24 . The method of making a composition of  claim 1 , wherein the surface-modified nanoparticles comprise a core, the core comprising an inorganic material selected from the group consisting of silica, titania, alumina, an oxide of zinc, an oxide of iron, metal phosphates, metal sulfates, metal chlorides, or a combination thereof 
     
     
         25 . The method of making a composition of  claim 1 , wherein the surface-modified nanoparticles comprise a core, the core comprising an organic polymer. 
     
     
         26 . The method of making a composition of  claim 1 , wherein a surface of the core is modified with a compound selected from the group consisting of alkylsilanes, carboxylic acids, phosphonic acids, sulfonates, polyethylene glycols, sugars, and a combination thereof 
     
     
         27 . The method of making a composition of  claim 1 , or the device of any one of claims  9  through  26 , wherein the nanoparticles have a mean diameter of not more than 20 nanometers. 
     
     
         28 . The method of making a composition of  claim 1 , wherein the amount of surface-modified nanoparticles in the composition is at least 0.02 percent and not more than 5 percent by weight of the composition. 
     
     
         29 . The method of making a composition of  claim 1 , wherein the composition has a respirable fraction which is at least 20 percent greater than a composition with the same ingredients without nanoparticles and a composition made by adding the nanoparticles to the same ingredients at the same time. 
     
     
         30 . The method of making a composition of  claim 1 , wherein the composition has an active ingredient delivery efficiency which is at least 10 percent greater than a composition with the same ingredients without nanoparticles and a composition made by adding the nanoparticles to the same ingredients at the same time.