Systems and processes for spray drying hydrophobic and hydrophilic components
First Claim
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1. A dry powder drug composition in the form of a unit dose, the composition comprising discrete particles having an average particle size of less than 10 μ
- m for delivery to the lungs as a dry powder, wherein each discrete particle comprises a drug component, a hydrophobic component having a water solubility of less than 5 mg/mL, and a hydrophilic component having a water solubility of greater than 5 mg/mL, wherein the unit dose is contained in a unit dose receptacle that is insertable into a dry powder inhaler.
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Abstract
Methods for preparing dry powders having hydrophobic and hydrophilic components comprise combining solutions of the components and spray drying them simultaneously in a spray dryer. The hydrophilic and hydrophobic component are separately dissolved in separate solvents and directed simultaneously through a nozzle, usually a coaxial nozzle, into the spray dryer. The method provides dry powders having relatively uniform characteristics.
247 Citations
31 Claims
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1. A dry powder drug composition in the form of a unit dose, the composition comprising discrete particles having an average particle size of less than 10 μ
- m for delivery to the lungs as a dry powder, wherein each discrete particle comprises a drug component, a hydrophobic component having a water solubility of less than 5 mg/mL, and a hydrophilic component having a water solubility of greater than 5 mg/mL, wherein the unit dose is contained in a unit dose receptacle that is insertable into a dry powder inhaler.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A dry powder drug composition comprising discrete particles having an average particle size of less than 10 μ
- m for delivery to the lungs as a dry powder, wherein each discrete particle comprises a hydrophobic component having a water solubility of less than 5 mg/mL, a hydrophilic component having a water solubility of greater than 5 mg/mL, and a chloride salt.
- View Dependent Claims (27, 28, 29)
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30. A dry powder drug composition comprising discrete particles having an average particle size of less than 10 μ
- m for delivery to the lungs as a dry powder, wherein each discrete particle comprises a hydrophobic component having a water solubility of less than 5 mg/mL, a hydrophilic component having a water solubility of greater than 5 mg/mL, and a salt of an acid.
- View Dependent Claims (31)
Specification