Phospholipid-based powders for drug delivery
First Claim
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1. A method for producing a phospholipid particulate composition comprising:
- adding a polyvalent cation to a formulation comprising a phospholipid wherein a molar ratio of polyvalent cation to phospholipid is sufficient to increase a gel-to-liquid crystal transition temperature of the particles compared to particles without the polyvalent cation such that the particles have a gel-to-liquid crystal transition temperature that is greater than room temperature by at least 20 C; and
drying said formulation to form a dry particulate composition comprising hollow and porous particles,wherein said dry particulate composition is characterized by being deliverable at an emitted dose of at least 54.55%.
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Abstract
Phospholipid based powders for drug delivery applications are disclosed. The powders may include a polyvalent cation in an amount effective to increase the gel-to-liquid crystal transition temperature of the particle compared to particles without the polyvalent cation. The powders are hollow and porous and are preferably administered via inhalation.
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Citations
19 Claims
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1. A method for producing a phospholipid particulate composition comprising:
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adding a polyvalent cation to a formulation comprising a phospholipid wherein a molar ratio of polyvalent cation to phospholipid is sufficient to increase a gel-to-liquid crystal transition temperature of the particles compared to particles without the polyvalent cation such that the particles have a gel-to-liquid crystal transition temperature that is greater than room temperature by at least 20 C; and drying said formulation to form a dry particulate composition comprising hollow and porous particles, wherein said dry particulate composition is characterized by being deliverable at an emitted dose of at least 54.55%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification