Emulsion compositions containing quaternary ammonium compounds
Compositions containing quaternary compounds in which the nitrogen atom is substituted by at least one alkyl group having at least 12 carbon atoms, and the composition includes at least 20% in weight by weight of the total composition, of ammonium halides in which the nitrogen atom is substituted by at least one alkyl group having at least 14 carbon atoms and more than 5%, preferably more than 7% in weight by weight of the total composition, of ammonium halides in which the nitrogen atom is substituted by at least one alkyl group having at least 16 carbon atoms. Also, ophthalmic oil-in-water emulsions containing such compositions, the ophthalmic emulsions being useful for eye care or for the treatment of eye conditions.
1. An oil-in-water emulsion comprising:
an oil phase comprising mineral oil, castor oil or medium chain triglycerides;
0.0005% to 0.1% w/w of ammonium halide, cetalkonium chloride being the sole ammonium halide of the emulsion; and
0.1% to 1% w/w of surfactant selected from the group consisting of tyloxapol, poloxamer 188, tocopherol polyethylene glycol succinate and mixtures thereof.
2. The oil-in-water emulsion according to claim 1 , wherein the mineral oil phase is a mixture of heavy and light mineral oil.
3. The oil-in-water emulsion according to claim 1 , further comprising buffering agents and/or at least one tonicity agent.
4. The oil-in-water emulsion according to claim 3 , wherein the tonicity agent is mannitol.
5. The oil-in-water emulsion according to claim 3 , wherein the tonicity agent is glycerol.
6. The oil-in-water emulsion according to claim 1 , said emulsion having a positive zeta potential.
7. The oil-in-water emulsion according to claim 1 , said emulsion having a droplet size of 100 to 500 nm.
8. The oil-in-water emulsion according to claim 1 , said emulsion comprising light and heavy mineral oil, tyloxapol, poloxamer 188, mannitol and cetalkonium chloride.
9. The oil-in-water emulsion according to claim 1 , said emulsion comprising light and heavy mineral oil, tyloxapol, poloxamer 188, glycerol and cetalkonium chloride.
10. The oil-in-water emulsion according to claim 1 , said emulsion being hypotonic, relative to normal tears.
11. The oil-in-water emulsion according to claim 1 , wherein said emulsion is suitable for ophthalmic use.
12. The oil-in-water emulsion according to claim 1 , said emulsion being less toxic than a solution comprising the same amount of cetalkonium chloride, in weight by weight of the solution.
13. The oil-in-water emulsion according to claim 1 , further comprising an active principle.
14. The oil-in-water emulsion according to claim 13 , wherein the active principle is cyclosporine.
15. A medicament comprising the oil-in-water emulsion according to claim 1 .
16. The medicament according to claim 15 , wherein said emulsion is suitable for ophthalmic use.
17. A method for preparing an ophthalmic composition for dry eye treatment, comprising preparing the emulsion according to claim 1 .
18. A kit for dry eye treatment comprising a first emulsion according to claim 1 and a second emulsion containing cyclosporine.
19. The oil-in-water emulsion according to claim 1 , wherein said emulsion comprises medium chain triglycerides, tyloxapol, poloxamer 188, glycerol and cetalkonium chloride.