Emulsion compositions containing quaternary ammonium compounds
Composition containing quaternary ammonium compounds in which the nitrogen atom is substituted by at least one alkyl group having at least 12 carbon atoms, the composition including 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. Ophthalmic oil-in-water emulsions containing such compositions, the ophthalmic emulsions being useful for eye care or for the treatment of eye conditions are also disclosed.
1. An oil-in-water emulsion comprising:
2% w/w of medium chain triglycerides;
0.005% w/w of cetalkonium chloride;
0.3% w/w of tyloxapol;
0.1% w/w of poloxamer 188;
2.25% w/w of glycerol; and
cyclosporine.
2. The oil-in-water emulsion according to claim 1 , further comprising buffering agents and/or at least one tonicity agent.
3. The oil-in-water emulsion according to claim 2 , wherein the tonicity agent is mannitol.
4. The oil-in-water emulsion according to claim 1 , said emulsion having a positive zeta potential.
5. The oil-in-water emulsion according to claim 1 , said emulsion having a droplet size of 100 to 500 nm.
6. The oil-in-water emulsion according to claim 1 , said emulsion being hypotonic, relative to normal tears.
7. The oil-in-water emulsion according to claim 1 , wherein said emulsion is in the form of a gel suitable for ophthalmic use.
8. A medicament comprising the oil-in-water emulsion according to claim 1 .
9. A method of preparing an ophthalmic composition for dry eye treatment, comprising preparing the emulsion according to claim 1 in a gel form.