REDUCTION OF FLAKE-LIKE AGGREGATION IN NANOPARTICULATE ACTIVE AGENT COMPOSITIONS
First Claim
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1. A nanoparticulate injectable composition comprising:
- (a) an active agent having an effective average particle size of less than about 2000 nm;
(b) at least one surface stabilizer adsorbed on the surface of the active agent; and
(c) a flake-like aggregation reducing agent.
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Abstract
This invention is directed to reduction of flake-like aggregation in nanoparticulate compositions. Also encompassed by the invention are compositions comprising a nanoparticulate active agent, at least one surface stabilizer and a flake-like aggregation reducing agent, such as a buffer and a sugar. The nanoparticulate active agent compositions comprise particles of the active agent having an effective average particle size of less than about 2000 nm.
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Citations
23 Claims
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1. A nanoparticulate injectable composition comprising:
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(a) an active agent having an effective average particle size of less than about 2000 nm; (b) at least one surface stabilizer adsorbed on the surface of the active agent; and (c) a flake-like aggregation reducing agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of reducing the flake-like aggregates in a nanoparticulate composition, comprising:
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(a) preparing a nanoparticulate dispersion of an active agent and at least one surface stabilizer, wherein the dispersion comprises a nanoparticulate active agent having an effective average particle size of less than about 2000 nm, at least one surface stabilizer, and a liquid in which the active agent is poorly soluble; and (b) adding a flake-like aggregation reducing agent to the dispersion of step (a). - View Dependent Claims (20, 21, 22, 23)
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Specification