Ophthalmic compositions containing a synergistic combination of three polymers
Ophthalmic compositions suitable for use as artificial tears or as vehicles for ophthalmic drugs are disclosed. The compositions contain a combination of three polymers that have a synergistic effect on viscosity.
1. An aqueous composition suitable for topical ophthalmic administration comprising three polymeric ingredients having a synergistic effect on the composition's viscosity wherein the three polymeric ingredients are hydroxypropyl methylcellulose in a concentration range of 0.05-0.5% (w/v) and a combination of two polymers selected from the group of combinations consisting of guar gum and a carboxyvinyl polymer; guar gum and hydroxyethyl cellulose; guar gum and dextran; hydroxyethyl cellulose and a carboxyvinyl polymer; and dextran and a carboxyvinyl polymer, provided that if the composition comprises a carboxyvinyl polymer then the composition does not contain sodium chloride or boric acid, and further provided that the viscosity of the composition is greater than 150% of the sum of the viscosities of three single polymer compositions that contain only one of the three polymeric ingredients, respectively.
2. The composition of claim 1 wherein the guar gum ingredient is hydroxypropyl guar.
3. The composition of claim 1 wherein the carboxyvinyl polymer is a polymer of acrylic acid crosslinked with allyl sucrose or allylpentaerythritol.
4. The composition of claim 1 wherein the total concentration of the three polymeric ingredients ranges from 0.1-1% (w/v).
5. The composition of claim 4 wherein the total concentration of the three polymeric ingredients ranges from 0.3-0.9% (w/v).
6. The composition of claim 5 wherein the total concentration of the three polymeric ingredients ranges from 0.4-0.7% (w/v).
7. The composition of claim 1 further comprising an ingredient selected from the group consisting of pharmaceutically acceptable buffering agents; preservatives; non-ionic tonicity-adjusting agents; surfactants; solubilizing agents; stabilizing agents; comfort-enhancing agents; emollients; pH-adjusting agents; and lubricants.
8. The composition of claim 1 further comprising an ophthalmic drug.
9. The composition of claim 8 wherein the ophthalmic drug is selected from the group consisting of anti-glaucoma agents; anti-angiogenesis agents; anti-infective agents; non-steroidal and steroidal anti-inflammatory agents; growth factors; immunosuppressant agents; and anti-allergic agents.
10. The composition of claim 1 wherein: the concentration of hydroxypropyl methylcellulose is equal to 0.3 w/v % or less; the concentration of carboxyvinyl polymer, when present, is equal to 0.1 w/v % or less; the concentration of guar gum, when present, is from 0.01 to 0.2 w/v %; the concentration of hydroxyethyl cellulose, when present, is from 0.1 to 0.2 w/v %; and the concentration of dextran polymer, when present, is from 0.01 to 0.2 w/v %.
11. The composition of claim 1 wherein: the concentration of hydroxypropyl methylcellulose is 0.3 w/v %; the concentration of carboxyvinyl polymer, when present, is 0.1 w/v %; the concentration of guar gum, when present, is from 0.01 to 0.2 w/v %; the concentration of hydroxyethyl cellulose, when present, is from 0.1 to 0.2 w/v %; and the concentration of dextran polymer, when present, is from 0.01 to 0.2 w/v %.
12. An aqueous composition suitable for topical ophthalmic administration comprising three polymeric ingredients having a synergistic effect on the composition's viscosity wherein the three polymeric ingredients are hydroxypropyl methylcellulose in a concentration range of 0.05-0.5% (w/v) and a combination of two polymers selected from the group of combinations consisting of guar gum and hydroxyethyl cellulose; guar gum and dextran, provided that the viscosity of the composition is greater than 150% of the sum of the viscosities of three single polymer compositions that contain only one of the three polymeric ingredients, respectively.
13. The composition of claim 12 wherein the guar gum ingredient is hydroxypropyl guar.
14. The composition of claim 12 wherein the total concentration of the three polymeric ingredients ranges from 0.1-1% (w/v).
15. The composition of claim 12 wherein the total concentration of the three polymeric ingredients ranges from 0.4-0.7% (w/v).
16. The composition of claim 12 further comprising an ophthalmic drug.
17. The composition of claim 16 wherein the ophthalmic drug is selected from the group consisting of anti-glaucoma agents; anti-angiogenesis agents; anti-infective agents; non-steroidal and steroidal anti-inflammatory agents; growth factors; immunosuppressant agents; and anti-allergic agents.
18. The composition of claim 12 wherein: the concentration of hydroxypropyl methylcellulose is equal to 0.3 w/v % or less; the concentration of guar gum, when present, is from 0.01 to 0.2 w/v %; the concentration of hydroxyethyl cellulose, when present, is from 0.1 to 0.2 w/v %; and the concentration of dextran polymer, when present, is from 0.01 to 0.2 w/v %.
19. The composition of claim 12 wherein: the concentration of hydroxypropyl methylcellulose is 0.3 w/v %; the concentration of guar gum, when present, is from 0.01 to 0.2 w/v %; the concentration of hydroxyethyl cellulose, when present, is from 0.1 to 0.2 w/v %; and the concentration of dextran polymer, when present, is from 0.01 to 0.2 w/v %.