Process for the preparation of sterile ophthalmic aqueous fluticasone propionate form a nanocrystals suspensions
A process of manufacturing sterile topical ophthalmic aqueous nanosuspensions of nanocrystals of fluticasone propionate Form A. The sterile topical ophthalmic nanosuspensions may be used in the treatment of eye inflammation conditions such as blepharitis, posterior blepharitis, Meibomian gland dysfunction and dry eye through topical administration of said nanosuspensions to eyelids, eyelashes and eyelid margin.
1 . An ophthalmic aqueous nanosuspension administrable topically onto eyelids, eyelashes or eyelid margin consisting of: (a) 0.1% w/w fluticasone propionate Form A nanocrystals and a vehicle consisting of:
(b) 0.50% w/w methylcellulose 4000 cp;
(c) 0.2% w/w polysorbate 80;
(d) 0.1% w/w edetate disodium dihydrate;
(e) 1.0% w/w boric acid;
(f) 0.9% w/w glycerol;
(g) 0.01% w/w benzalkonium chloride;
(h) 0.055% w/w sodium chloride;
(i) hydrochloric acid 1N and/or sodium hydroxide 1N as adjusting agents in an amount sufficient to pH 7.3-7.5; and
(j) water q.s. to 100% w/w,
wherein said nanocrystals of fluticasone propionate Form A have a mean particle size from 100 nm to 1000 nm and a X-ray powder diffraction pattern comprising peaks at about 7.8, 15.7, 20.8, 23.7, 24.5, and 32.5 degrees 2⊖, further comprising peaks at about 9.9, 13.0, 14.6, 16.0, 16.9, 18.1, and 34.3 degrees 2⊖, and wherein the nanocrystals are nanoplates having a [001] crystallographic axis normal to a surfaces that define a thickness of the nanoplates, wherein said ophthalmic aqueous nanosuspension contains a boric acid/glycerol complex.
2 . The ophthalmic aqueous nanosuspension according to claim 1 , wherein the boric acid/glycerol complex is formed by adding the glycerol to a de-agglomerated slurry containing the fluticasone propionate Form A nanocrystals suspended in a vehicle that contains the boric acid but does not contain the glycerol.
3 . A method of treating dry eye disease comprising topically applying an effective amount of the ophthalmic aqueous nanosuspension according to claim 1 to eyelids, eyelashes and eyelid margin of a subject in need thereof.
4 . A method of reducing the symptoms and/or clinical signs associated with dry eye disease comprising topically applying an effective amount of the ophthalmic aqueous nanosuspension according to claim 1 to eyelids, eyelashes and eyelid margin of a subject in need thereof.
5 . The method according to claim 3 , wherein the method comprises applying an effective amount of the ophthalmic aqueous nanosuspension at least once a day for at least two weeks to a subject in need thereof.
6 . The method according to claim 4 , wherein the method comprises applying an effective amount of the ophthalmic aqueous nanosuspension at least once a day for at least two weeks to a subject in need thereof.
7 . The ophthalmic aqueous nanosuspension according to claim 1 and a swab or sponge to apply said aqueous nanosuspension to eyelids, eyelashes or eyelid margin.
8 . A method of treating dry eye disease comprising topically applying an effective amount of the ophthalmic aqueous nanosuspension according to claim 2 to eyelids, eyelashes and eyelid margin of a subject in need thereof.
9 . A method of reducing the symptoms and/or clinical signs associated with dry eye disease comprising topically applying an effective amount of the ophthalmic aqueous nanosuspension according to claim 2 to eyelids, eyelashes and eyelid margin of a subject in need thereof.
10 . The method according to claim 8 , wherein the method comprises applying an effective amount of the ophthalmic aqueous nanosuspension at least once a day for at least two weeks to a subject in need thereof.
11 . The method according to claim 9 , wherein the method comprises applying an effective amount of the ophthalmic aqueous nanosuspension at least once a day for at least two weeks to a subject in need thereof.
12 . The ophthalmic aqueous nanosuspension according to claim 2 and a swab or sponge to apply said aqueous nanosuspension to eyelids, eyelashes or eyelid margin.