Compositions and methods for treating diseases of the nail

1. A pharmaceutical formulation comprising: (a) ethanol; (b) cyclomethicone; (c) diisopropyl adipate; and (d) mixed C12-15 alkyl lactates;

wherein the surface tension of the formulation is 40 dynes/cm or less;

wherein the concentration of ethanol is at least 50% w/w of the composition; and

wherein the formulation is free of polymeric film forming compounds.

2. The pharmaceutical formulation of claim 1 , wherein the formulation is for delivery of an active pharmaceutical ingredient to the nail or nail bed.

3. The pharmaceutical formulation of claim 1 , wherein the surface tension is 35 dynes/cm or less.

4. The pharmaceutical formulation of claim 3 , wherein the surface tension is 30 dynes/cm or less.

5. The pharmaceutical formulation of claim 4 , wherein the surface tension is 25 dynes/cm or less.

6. The pharmaceutical formulation of claim 1 , wherein the cyclomethicone is present at a concentration in the range of 2-15% w/w of the formulation, and wherein the diisopropyl adipate and C12-15 alkyl lactate are present at a total concentration in the range of 12-60% w/w of the formulation.

7. The pharmaceutical formulation of claim 1 , wherein the cyclomethicone is present at a concentration of about 13% w/w of the formulation; the diisopropyl adipate is present at a concentration in the range of about 12% w/w; the mixed C12-15 alkyl lactates are present at a concentration of about 10% w/w of the formulation; and the ethanol is present at a concentration of about 65% w/w of the formulation.

8. The pharmaceutical formulation of claim 1 , further comprising an antifungal active pharmaceutical ingredient.

9. The pharmaceutical formulation of claim 8 , wherein the antifungal active pharmaceutical ingredient comprises an imidazole or a triazole compound.

10. The pharmaceutical formulation of claim 6 , further comprising an antifungal active pharmaceutical ingredient selected from the group consisting of miconazole, ketoconazole, clotrimazole, econazole, bifonazole, butoconazole, fenticonazole, isoconazole, oxiconazole, sertaconazole, suconazole, tioconazole, fluconazole, itraconazole, ravuconazole, posaconazole, voriconazole, terconazole, and (2R,3R)-2-(2,4-difluorophenyl)-3-(4-methylenepiperidine-1-yl)-1-(1H-1,2,4-triazole-1-yl)butane-2-ol.

11. A method for the treatment of a disorder of the nail or nail bed comprising topically applying to the surface of the nail of an individual suffering from said disorder a pharmaceutical composition comprising an active pharmaceutical ingredient and (a) ethanol; (b) cyclomethicone; (c) diisopropyl adipate and (d) mixed C12-15 alkyl lactates, wherein the application of the composition is in an amount and for a time sufficient to ameliorate the signs and symptoms of the disorder, wherein the surface tension of the composition is 40 dynes/cm or less, wherein the concentration of ethanol is at least 50% w/w of the composition, and wherein the composition, when applied to the surface of a nail, does not form a solid film.