Oil-in-water emulsions comprising cetalkonium chloride and methods of making and using the same
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. A method for treating an eye disease or an eye condition in a subject in need thereof, said method comprising a step of administration to said subject of 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;
0.1% to 1% w/w of a surfactant selected from tyloxapol, poloxamer 188, polysorbate 80, tocopherol polyethylene glycol succinate and sorbitan monolaurate or a mixture thereof; and
water.
2. The method according to claim 1 , wherein said eye condition is a dry eye condition.
3. The method according to claim 2 , wherein said dry eye condition is selected from dry eye accompanying lacrimal fluid reduction, tear deficiency, xerosis of the eye, Sjogren's syndrome, keratoconjunctivitis sicca (KCS), atopic keratoconjunctivitis sicca (AKC), vernal keratoconjunctivitis (VKC), Stevens-Johnson syndrome, pemphigoid of the eye, marginal blepharitis, failure in eyelids closure, or sensory nerve numbness, dry eye accompanying allergic conjunctivitis, dry eye after viral conjunctivitis, dry eye after cornea surgery including laser in situ keratomileusis (LASIK), dry eye after cataract surgery, dry eye associated with contact lens wearing, and dry eye associated with VDT tasks.
4. The method according to claim 1 , wherein said mineral oil is a mixture of heavy and light mineral oil.
5. The method according to claim 1 , wherein said oil-in-water emulsion further comprises buffering agents and/or at least one tonicity agent.
6. The method according to claim 5 , wherein said tonicity agent is mannitol or glycerol.
7. The method according to claim 1 , wherein said oil-in-water emulsion has a positive zeta potential.
8. The method according to claim 1 , wherein said oil-in-water emulsion has a droplet size of 100 to 500 nm.
9. The method according to claim 1 , wherein said oil-in-water emulsion comprises light and heavy mineral oil, tyloxapol, poloxamer 188, mannitol and cetalkonium chloride.
10. The method according to claim 1 , wherein said oil-in-water emulsion comprises light and heavy mineral oil, tyloxapol, poloxamer 188, glycerol and cetalkonium chloride.
11. The method according to claim 1 , wherein said oil-in-water emulsion comprises medium chain triglycerides, tyloxapol, poloxamer 188, glycerol and cetalkonium chloride.
12. The method according to claim 1 , wherein said oil-in-water emulsion is hypotonic, relative to normal tears.
13. The method according to claim 1 , wherein said oil-in-water emulsion is suitable for ophthalmic use.
14. The method according to claim 1 , wherein said oil-in-water emulsion is less toxic than a solution comprising the same amount of cetalkonium chloride, in weight by weight of the solution.
15. The method according to claim 1 , wherein said oil-in-water emulsion further comprises an active principle.
16. The method according to claim 15 , wherein said active principle is cyclosporine.
17. A method for preparing an ophthalmic composition for dry eye treatment, said method comprising the following steps:
(1) manufacturing a pre-concentrate of an oil-in-water emulsion as described in claim 1 , said pre-concentrate having a content in oil of at least 4% v/v, by emulsifying and/or mixing said oil phase and said surfactants with an aqueous phase comprising water, so as to obtain said pre-concentrate; and then
(2) diluting one volume of said pre-concentrate with 2 to 50 volumes of water, so as to obtain the oil-in-water emulsion of claim 1 .
18. The method according to claim 17 , wherein said oil phase further comprises an active principle.
19. The method according to claim 18 , wherein said active principle is cyclosporine.
20. A kit for dry eye treatment comprising a first emulsion as described in claim 1 and a second emulsion containing cyclosporine.