Ophthalmic delivery system
First Claim
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1. An ophthalmic formulation comprising:
- a therapeutically effective amount of at least one active agent, and 0.5 to 5 weight percent of a dissolved sodium alginate comprising at least 50% guluronic acid,said sodium alginate undergoing a change from a dissolved phase to a gel phase upon contacting lacrimal fluid.
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Abstract
The present invention relates to formulations particularly well suited for use as delivery systems in the delivery of an active agent to the eye. The formulations comprise an alginate having a particular proportion of guluronic acid.
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Citations
12 Claims
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1. An ophthalmic formulation comprising:
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a therapeutically effective amount of at least one active agent, and 0.5 to 5 weight percent of a dissolved sodium alginate comprising at least 50% guluronic acid, said sodium alginate undergoing a change from a dissolved phase to a gel phase upon contacting lacrimal fluid. - View Dependent Claims (2, 5, 6, 7, 8, 9)
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3. An ophthalmic formulation comprising:
a therapeutically effective amount of at least one active agent, and 0.5 to 5 weight percent of a dissolved sodium alginate whose composition comprises no more than 50% mannuronic acid, said sodium alginate undergoing a change from a dissolved phase to a gel phase upon contacting lacrimal fluid. - View Dependent Claims (4)
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10. A method of treating diseases of the eye comprising:
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administering a controlled release ophthalmic formulation to the eye, said ophthalmic formulation comprising; a therapeutically effective amount of at least one active agent, and 0.5 to 5 weight percent of a dissolved sodium alginate comprising at least 50% guluronic acid, said sodium alginate undergoing a change from a dissolved phase to a gel phase after administering to the eye and contacting lacrimal fluid. - View Dependent Claims (11)
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12. A method of treating diseases of the eye comprising:
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administering a controlled release ophthalmic formulation to the eye, said ophthalmic formulation comprising; 0.5 to 5 weight percent of a dissolved sodium alginate comprising at least 50% guluronic acid, said sodium alginate undergoing a change from a dissolved phase to a gel phase after administering to the eye and contacting lacrimal fluid.
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Specification