Formulations with a Tertiary Amine Oxide
A topical pharmaceutical formulation comprising 0.5 ppm to 1000 ppm of a tertiary amine oxide of general formula I wherein R 1 is a C 8 -C 18 alkyl, and R 2 and R 3 are independently selected from a C 1 -C 4 alkyl or C 1 -C 4 hydroxyalkyl. The tertiary amine oxide functions as a preservative or enhances the preservative efficacy in such formulations developed for topical administration. In particular, the topical formulation is an ophthalmic composition.
1 . A topical pharmaceutical formulation comprising: 0.5 ppm to 1000 ppm of a tertiary amine oxide of general formula I
wherein R 1 is a C 8 -C 18 alkyl, and R 2 and R 3 are independently selected from a C 1 -C 4 alkyl or C 1 -C 4 hydroxyalkyl; and a pharmaceutical active agent, wherein the tertiary amine oxide functions as a preservative or enhances the preservative efficacy of the pharmaceutical formulation.
2 . The formulation of claim 1 further comprising An additional preservative component.
3 . The formulation of claim 2 wherein the additional preservative component is a cationic, preservative component selected from the group consisting of quaternary ammonium compounds and their polymers and biguanides and their polymers.
4 . The formulation of claim 2 wherein the tertiary amine oxide is present at a concentration from 0.5 ppm to 300 ppm.
5 . The formulation of claim 1 wherein the tertiary amine oxide includes myristamine oxide or lauramine oxide.
6 . The formulation of claim 4 wherein the tertiary amine oxide includes myristamine oxide or lauramine oxide.
7 . The formulation of claim 1 further comprising hydroxypropyl guar, hyaluronic acid, alginate, dexpanthenol or hydroxypropylmethyl cellulose.
8 . The formulation of claim 3 wherein the cationic, preservative component is selected from poly(hexamethylene biguanide), which is present in the formulation from 0.1 ppm to 1.3 ppm, alexidine, which is present in the formulation from 0.5 ppm to 5 ppm, or α-[4-tris(2-hydroxyethyl)-ammonium chloride-2-butenyl]poly[1-dimethyl ammonium chloride-2-butenyl]-ω-tris(2-hydroxyethyl) ammonium chloride (polyquaternium-1), which is present in the formulation from 0.5 ppm to 3 ppm, or polyquatemium-42.
9 . The formulation of claim 2 wherein the preservative component is selected from the group consisting of polylysine, diglycine, sorbic acid, polypeptide and hydrogen peroxide or a stabilized form of hydrogen peroxide.
10 . The formulation of claim 1 wherein the tertiary amine oxide is present from 0.5 ppm to 60 ppm.
11 . The formulation of claim 4 wherein the pharmaceutical agent is a prescription pharmaceutical agent.
12 . An ophthalmic composition comprising 0.5 ppm to 600 ppm of a tertiary amine oxide of general formula I
wherein R 1 is a C 8 -C 18 alkyl, and R 2 and R 3 are independently selected from a C 1 -C 4 alkyl or C 1 -C 4 hydroxyalkyl, the ophthalmic composition having an osmolality of 225 mOsm/kg to 400 mOsm/kg.
13 . The ophthalmic composition of claim 12 wherein the tertiary amine oxide includes myristamine oxide or lauramine oxide, and the composition further comprises hydroxypropyl guar, hyaluronic acid, alginate, dexpanthenol or hydroxypropylmethyl cellulose.
14 . The ophthalmic composition of claim 12 wherein the tertiary amine oxide includes myristamine oxide or lauramine oxide, and the composition further comprises a cationic, preservative component selected from poly(hexamethylene biguanide), which is present in the formulation from 0.1 ppm to 1.3 ppm, alexidine, which is present in the formulation from 0.5 ppm to 5 ppm, or α-[4-tris(2-hydroxyethyl)-ammonium chloride-2-butenyl]poly[1-dimethyl ammonium chloride-2-butenyl]-ω-tris(2-hydroxyethyl) ammonium chloride (polyquaternium-1), which is present in the formulation from 0.5 ppm to 3 ppm, or polyquatemium-42.
15 . The ophthalmic composition of claim 12 further comprising a pharmaceutical active agent for the treatment of an ocular disease or disorder.
16 . A method to preserve a pharmaceutical formulation, the method comprising adding a tertiary amine oxide of general formula I to the pharmaceutical formulation
wherein R 1 is a C 8 -C 18 alkyl, and R 2 and R 3 are independently selected from a C 1 -C 4 alkyl or C 1 -C 4 hydroxyalkyl, and the tertiary amine oxide is present from 0.5 ppm to 1000 ppm, wherein the pharmaceutical formulation is a multi-dose, topical formulation that includes a pharmaceutical active agent.
17 . The method of claim 16 wherein the tertiary amine oxide includes myristamine oxide or lauramine oxide, which is present at a concentration from 0.5 ppm to 300 ppm.
18 . The method of claim 16 further comprising adding a cationic, preservative component selected from the group consisting of quaternary ammonium compounds and their polymers and biguanides and their polymers, to enhance the preservative efficacy of the pharmaceutical formulation.
19 . The method of claim 16 further comprising adding a preservative component selected from the group consisting of polylysine, diglycine, sorbic acid, polypeptide and hydrogen peroxide or a stabilized form of hydrogen peroxide to enhance the preservative efficacy of the pharmaceutical formulation.
20 . The method of claim 16 wherein the pharmaceutical active agent present in the pharmaceutical formulation provides for the treatment of an ocular disease or disorder.