Use of borate-polyol complexes in ophthalmic compositions
First Claim
1. A method of preparing an aqueous ophthalmic composition, comprising the steps of preparing a water-soluble borate-polyol complex by mixing borate and a polyol together in an aqueous solvent and adding polyvinyl alcohol thereto, wherein the borate-polyol complex is present at a concentration of 0.5 to 6.0 wt % and the molar ratio of borate to polyol is 1:
- 0.1 to 1;
10.
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Accused Products
Abstract
Water-soluble borate-polyol complexes are useful as buffers and/or antimicrobials in aqueous ophthalmic compositions, including those containing polyvinyl alcohol. These compositions have greater antimicrobial activity than comparable compositions containing typical borate buffers and unexpectedly increase the antimicrobial efficacy of other antimicrobial agents when used in combination. In addition, use of the borate-polyol complexes avoids the incompatibility problem typically associated with the combination of borate buffer and polyvinyl alcohol; therefore, the compositions disclosed herein may also contain polyvinyl alcohol.
71 Citations
8 Claims
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1. A method of preparing an aqueous ophthalmic composition, comprising the steps of preparing a water-soluble borate-polyol complex by mixing borate and a polyol together in an aqueous solvent and adding polyvinyl alcohol thereto, wherein the borate-polyol complex is present at a concentration of 0.5 to 6.0 wt % and the molar ratio of borate to polyol is 1:
- 0.1 to 1;
10. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- 0.1 to 1;
Specification