High efficient delivery of a large therapeutic mass aerosol
View Patent ↗A method for delivering a therapeutic dose of a bioactive agent to the pulmonary system, in a single, breath-activated step, comprises administering from a receptacle enclosing a mass of particles, to a subject's respiratory tract, particles which have a tap density of less than 0.4 g/cm 3 and deliver at least about 50% of the mass of particles. Another method of delivering a therapeutic dose of a bioactive agent to the pulmonary system, in a single breath, includes administering from a receptacle enclosing a mass of particles, to a subject's respiratory tract, particles which have a tap density of at least 0.4 g/cm 3 and deliver at least about 10 milligrams of the bioactive agent. The receptacle can have a volume of at least 0.37 cm 3 .
1. A method of delivering a therapeutic dose of a bioactive agent to the pulmonary system of a subject, in a single, breath-activated step, comprising:
administering particles comprising a bioactive agent, from a receptacle having a mass of particles, to a subject's respiratory tract,
wherein:
i) the particles administered to the subject's respiratory tract have a tap-density of less than 0.4 g/cm 3 ;
ii) at least 75% of the particles have a fine particle fraction less than 6.8 μm and
iii) at least about 50% of the mass of particles stored in the receptacle is delivered to the pulmonary system of the subject.
2. The method of claim 1 wherein the particles have a tap density of less than about 0.1 g/cm 3 .
3. The method of claim 1 wherein the particles have a geometric diameter greater than about 5 μm.
4. The method of claim 1 wherein the receptacle has a volume of at least about 0.37 cm 3 .
5. The method of claim 1 wherein the receptacle has a volume of at least about 0.48 cm 3 .
6. The method of claim 1 wherein the receptacle has a volume of at least about 0.67 cm 3 .
7. The method of claim 1 wherein the receptacle has a volume of at least about 0.95 cm 3 .
8. The method of claim 1 wherein delivery is primarily to the deep lung.
9. The method of claim 1 wherein delivery is primarily to the central airways.
10. The method of claim 1 wherein the bioactive agent is albuterol sulfate.
11. The method of claim 1 wherein the bioactive agent is insulin.
12. The method of claim 1 wherein the bioactive agent is growth hormone.
13. The method of claim 1 wherein the bioactive agent is fluticasone.
14. The method of claim 1 wherein the bioactive agent is salmeterol.
15. The method of claim 1 wherein the bioactive agent is a hydrophobic drug.
16. The method of claim 1 wherein the bioactive agent is a hydrophilic drug.
17. The method of claim 1 wherein the bioactive agent is a monoclonal antibody.
18. The method of claim 1 wherein the particles are in the form of a dry powder.
19. The method of claim 1 wherein administration to the respiratory tract is by a dry powder inhaler.
20. A method of delivering a therapeutic dose of a bioactive agent to the pulmonary system of a subject, in a single breath, comprising:
administering dry powder particles comprising a bioactive agent, from a receptacle having a mass of particles, to a subject's respiratory tract in a single breath,
wherein:
i) the particles have a tap density less than about 0.4 g/cm 3 ;
ii) at least about 5 milligrams of the bioactive agent is delivered to the pulmonary system of the subject and
iii) at least 75% of the particles have a fine particle fraction less than 6.8 μm.
21. The method of claim 20 wherein the particles have a tap density of less than about 0.1 g/cm 3 .
22. The method of claim 20 wherein the particles have a geometric diameter greater than about 5 μm.
23. The method of claim 20 wherein the receptacle has a volume of at least about 0.37 cm 3 .
24. The method of claim 20 wherein the receptacle has a volume of at least about 0.48 cm 3 .
25. The method of claim 20 wherein the receptacle has a volume of at least about 0.67 cm 3 .
26. The method of claim 20 wherein the receptacle has a volume of at least about 0.95 cm 3 .
27. The method of claim 20 wherein the particles deliver at least 15 milligrams of the bioactive agent.
28. The method of claim 20 wherein the particles deliver at least 20 milligrams of the bioactive agent.
29. The method of claim 20 wherein the particles deliver at least 30 milligrams of the bioactive agent.
30. The method of claim 20 wherein the particles deliver at least 35 milligrams of the bioactive agent.
31. The method of claim 20 wherein the particles deliver at least 50 milligrams of the bioactive agent.
32. The method of claim 20 wherein delivery is primarily to the deep lung.
33. The method of claim 20 wherein delivery is primarily to the central airways.
34. The method of claim 20 wherein the bioactive agent is albuterol sulfate.
35. The method of claim 20 wherein the bioactive agent is insulin.
36. The method of claim 20 wherein the bioactive agent is growth hormone.
37. The method of claim 20 wherein the bioactive agent is ipratropium bromide.
38. The method of claim 20 wherein the bioactive agent is fluticasone.
39. The method of claim 20 wherein the bioactive agent is salmeterol.
40. The method of claim 20 wherein the bioactive agent is a hydrophobic drug.
41. The method of claim 20 wherein the bioactive agent is a hydrophilic drug.
42. The method of claim 20 wherein the bioactive agent is a monoclonal antibody.
43. The method of claim 20 wherein the particles are in the form of a dry powder.
44. The method of claim 20 wherein administration to the respiratory tract is by a dry powder inhaler.
45. The method of claim 1 wherein at least 50% of the particles have a fine particle fraction less than 4.0 μm.
46. The method of claim 20 wherein at least 50% of the particles have a fine particle fraction less than 4.0 μm.
47. The method of claim 1 wherein said particles are spray dried particles.
48. The method of claim 20 wherein said particles are spray dried particles.
49. The method of claim 20 wherein the particles deliver at least 10 milligrams of the bioactive agent.