Sustained release ophthalmic, otic and nasal suspension
AssigneeAlcon Inc.
InventorsOnkar N. Singh, Ernesto J. Castillo
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Abstract
Sustained release suspension formulations for ophthalmic, otic and nasal administration are disclosed. The formulations comprise a basic active, a cation exchange resin, and a combination of a polymeric suspending agents to provide superior resuspendability.
Claims9
In a topically administrable, aqueous suspension composition comprising a basic active component, an ion exchange resin, and a polymeric suspending component, the improvement wherein the polymeric suspending component consists essentially of a combination of a carboxyvinyl polymer and a cellulose polymer selected from the group consisting of hydroxyethyl cellulose;
- hydroxypropyl cellulose;
- and carboxymethyl cellulose.
Dependencies are inferred from the claim text.