TANNATE DRY POWDER FORMULATIONS
First Claim
1. A dry powder formulation comprising one or more bioactive agents, tannic acid, a high molecular weight polymeric dispersant, and a viscosity modifying agent,wherein the dry powder formulation is stable for at least two weeks at 25°
- C. and 60% relative humidity.
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Accused Products
Abstract
Dry powder tannate compositions containing bioactive agents, tannic acid, dispersants, and viscosity modifying agents are disclosed. Specifically, the bioactive agents are antihistamines, decongestants, antitussives, and anticholinergics. The dry powder formulations can further include pharmaceutically acceptable excipients. The dry powder formulations exhibit increased stability for extended shelf life. Bioactive agent tannate salts remain suspended for at least two weeks following formation of the suspension in a pharmaceutically acceptable aqueous liquid.
8 Citations
58 Claims
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1. A dry powder formulation comprising one or more bioactive agents, tannic acid, a high molecular weight polymeric dispersant, and a viscosity modifying agent,
wherein the dry powder formulation is stable for at least two weeks at 25°
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56. A method for the preparation of stable dry powder formulations, comprising:
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(a) mixing one or more bioactive agents, tannic acid, a high molecular weight polymeric dispersant, and a viscosity modifying agent, all in their non-reactive dry powder forms, with a low shear blender until uniformly mixed, and (b) filling a container with the dry powder, wherein the one or more bioactive agents present in the dry powder formulation degrades less than about 5%, as determined by high performance liquid chromatography, for at least two weeks at 25°
C. and 60% relative humidity.
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Specification