High concentration formulation

1. A topical pharmaceutical formulation comprising cortexolone-17α-propionate at a concentration of about 5 weight percent to about 15 weight percent, and a pharmaceutically acceptable amount of one or more pharmaceutically acceptable solvents, wherein the cortexolone-17α-propionate is fully solubilized in the formulation, and wherein the formulation contains less than about 5 percent water.

2. The pharmaceutical formulation of claim 1 , wherein the formulation comprises about 7.5 weight percent cortexolone-17α-propionate.

3. The pharmaceutical formulation of claim 1 , wherein the formulation comprises about 5 weight percent cortexolone-17α-propionate.

4. The pharmaceutical formulation of claim 1 , wherein the formulation is a liquid or semi-solid formulation.

5. The pharmaceutical formulation of claim 4 , wherein the formulation is a liquid.

6. The pharmaceutical formulation of claim 5 , wherein the liquid formulation is a solution, a suspension, an emulsion, or a microemulsion.

7. The pharmaceutical formulation of claim 4 , wherein the formulation is a semi-solid formulation.

8. The pharmaceutical formulation of claim 7 , wherein the semi-solid formulation is a cream, a gel, a foam, or an ointment.

9. The pharmaceutical formulation of claim 8 , wherein the semi-solid formulation is a cream.

10. The pharmaceutical formulation of claim 1 , wherein the formulation contains less than about 3 percent water.

11. The pharmaceutical formulation of claim 1 , wherein the formulation is anhydrous.

12. The pharmaceutical formulation of claim 1 , wherein the one or more pharmaceutically acceptable solvents comprise at least one of a C 1 -C 7 alcohol, a polyol ether, a polyol, a natural oil, an ester, tricaprylin, a medium-chain triglyceride, or a caprylocaproyl-8 glyceride.

13. The pharmaceutical formulation of claim 1 , wherein the formulation comprises two or more pharmaceutically acceptable solvents.

14. A method of treating androgenetic alopecia in a subject in need thereof, comprising topically administering to the subject in need thereof an effective amount of the pharmaceutical formulation as claimed in claim 1 .

15. A method of treating androgenetic alopecia, the method comprising topically administering to a subject in need thereof an effective amount of the topical pharmaceutical formulation as claimed in claim 1 , wherein twice a day topical administration of the formulation for at least six months achieves hair growth comparable to hair growth observed upon administration of oral finasteride for the same period of time.

16. A method of treating androgenetic alopecia, the method comprising topically administering to a subject in need thereof an effective amount of the topical pharmaceutical formulation as claimed in claim 1 , wherein the topical administration of the formulation for at least six months is free from systemic antiandrogenic side-effects.

17. A method of treating androgenetic alopecia, the method comprising topically administering to a subject in need thereof an effective amount of the topical pharmaceutical formulation as claimed in claim 1 , wherein the topical administration of the formulation provides at least one of the following effects:

a) a mean change from baseline in Target Area Hair Count equal to or higher than 9 hairs/cm 2 after 6 months of daily or BID application; or

b) a mean change from baseline in Target Area Hair Count equal to or higher than 10 hairs/cm 2 after 6 months of daily or BID application; or

c) a mean change from baseline in Target Area Hair Count equal to or higher than 11 hairs/cm 2 after 6 months of daily or BID application; or

d) a mean change from baseline in Target Area Hair Count equal to or higher than 12 hairs/cm 2 after 6 months of daily or BID application; or

e) a weighted average HGA score equal to or higher than 0.20 after 6 months of daily or BID application; or

f) a weighted average HGA score equal to or higher than 0.30 after 6 months of daily or BID application; or

g) a weighted average HGA score equal to or higher than 0.40 after 6 months of daily or BID application; or

h) a weighted average IGA score equal to or higher than 0.10 after 6 months of daily or BID application; or

i) a weighted average IGA score equal to or higher than 0.20 after 6 months of daily or BID application; or

j) a weighted average IGA score equal to or higher than 0.30 after 6 months of daily or BID application; or

k) a favorable (positive) HGA score in at least about 10% of subjects after 6 months of daily or BID application; or

l) a favorable (positive) HGA score in at least about 20% of subjects after 6 months of daily or BID application; or

m) a favorable (positive) HGA score in at least about 30% of subjects after 6 months of daily or BID application; or

n) a favorable (positive) IGA score in at least about 10% of subjects after 6 months of daily or BID application; or

o) a favorable (positive) IGA score in at least about 20% of subjects after 6 months of daily or BID application; or

p) a favorable (positive) IGA score in at least about 30% of subjects after 6 months of daily or BID application; or

q) a favorable (positive) IGA score in at least about 40% of subjects after 6 months of daily or BID application.

18. A method of increasing hair growth in a subject suffering from androgenetic alopecia, comprising topically administering an effective amount of the pharmaceutical formulation as claimed in claim 1 once daily to the subject.

19. The method of claim 18 , wherein about 1 ml of the formulation is administered at least once a day on the first day.

20. The method of claim 18 , wherein the formulation is administered twice daily.