Abiraterone Acetate Formulation and Methods of Use

Abstract

Pharmaceutical compositions, including unit dosage forms, comprising abiraterone acetate and methods for producing and using such compositions are described.

1 .- 23 . (canceled) 
     
     
         24 . A solid oral unit dosage form of abiraterone acetate containing 125 mg of abiraterone acetate having a [D50] greater than 100 nm and less than 1200 nm, the unit dosage form further comprising a diluent, a wetting agent, a disintegrant, a lubricant, and one or both of an antioxidant and a sequestering agent,
 wherein a 500 mg dose of the unit dosage form is bioequivalent to a 1000 mg dose of Zytiga® Tablets (250 mg; National Drug Code Number 57894-150; NDA 202379) in healthy male subjects in the fasted state;   wherein the dissolution rate of the abiraterone acetate in the unit dosage form is such that when the unit dosage form is tested in 900 ml of pH 4.5 phosphate buffer with 0.12% sodium lauryl sulfate using USP Apparatus II at 75 rpm, at least 70% of the abiraterone acetate dissolves in between 5 and 15 minutes; and   wherein a 500 mg dose, upon oral administration to a population of healthy male subjects in the fasted state, provides a mean blood plasma Cmax of 50-120 ng/ml and a mean blood plasma AUC (0-∞)  of 240-650 h*ng/ml.   
     
     
         25 . The unit dosage form of abiraterone acetate of  claim 24 , wherein the ratio of the log of the geometric mean of the AUC (0-∞)  for a 500 mg dose administered to healthy male subjects in the fasted state compared to a 1000 mg dose of Zytiga® Tablets (250 mg; National Drug Code Number 57894-150; NDA 202379) administered to healthy male subjects in the fasted state is selected from: 0.6 to 1.4, 0.7 to 1.3, 0.8 to 1.2 and 0.9 to 1.1. 
     
     
         26 . The unit dosage form of abiraterone acetate of  claim 24 , wherein the ratio of the log of the geometric mean of the C(max) for a 500 mg dose administered to healthy male subjects in the fasted state compared to a 1000 mg dose of Zytiga® Tablets (250 mg; National Drug Code Number 57894-150; NDA 202379) administered to healthy male subjects in the fasted state is selected from: 0.6 to 1.4, 0.7 to 1.3, 0.8 to 1.2 and 0.9 to 1.1. 
     
     
         27 . The unit dosage form of abiraterone acetate of  claim 24 , wherein the [D90] of the abiraterone acetate is greater than 300 nm and less than one of: 3000 nm, 2000 nm, 900 nm, 800 nm, and 700 nm. 
     
     
         28 . The unit dosage form of abiraterone acetate of  claim 24 , wherein the [D50] of the abiraterone acetate is greater than 100 nm and less than one of: 1000 nm, 800 nm, 500 nm, 400 nm, and 300 nm. 
     
     
         29 . The unit dosage form of abiraterone acetate of  claim 24 , wherein the [D4,3] of the abiraterone acetate is greater than 300 nm and less than one of: 1100 nm, 900 nm, and 800 nm. 
     
     
         30 . The unit dosage form of abiraterone acetate of  claim 24 , wherein the dissolution rate of the abiraterone acetate in the unit dosage form is such that when the unit dosage form is tested in 900 ml of pH 4.5 phosphate buffer with 0.12% sodium lauryl sulfate using USP Apparatus II at 75 rpm, at least 70% of the abiraterone acetate dissolves in between 5 and 10 min. 
     
     
         31 . The unit dosage form of abiraterone acetate of  claim 24 , wherein a 500 mg dose, upon oral administration to a population of healthy male subjects in the fasted state, provides a median blood plasma tmax of 1 to 2.5 hrs. 
     
     
         32 . The unit dosage form of abiraterone acetate of  claim 24 , wherein the 90% confidence interval of the mean blood plasma Cmax is a value between 50 and 120 ng/ml when a 500 mg dose is administered to healthy male subjects in the fasted state. 
     
     
         33 . The unit dosage form of abiraterone acetate of  claim 24 , wherein the 90% confidence interval of the mean blood plasma AUC (0-∞) is a value between 240 and 650 h*ng/ml when a 500 mg dose is administered to healthy male subjects in the fasted state. 
     
     
         34 . The unit dosage form of  claim 24 , wherein the antioxidant comprises BHA and BHT. 
     
     
         35 . A unit dosage form of abiraterone acetate containing 125 mg of abiraterone acetate having a [D50] greater than 100 nm and less than 1200 nm, the unit dosage form further comprising a diluent, a wetting agent, a disintegrant, a lubricant, and one or both of an antioxidant and a sequestering agent,
 wherein the dissolution rate of the abiraterone acetate in the unit dosage form is such that when the unit dosage form is tested in 900 ml of pH 4.5 phosphate buffer with 0.12% sodium lauryl sulfate using USP Apparatus II at 75 rpm, at least 70% of the abiraterone acetate dissolves in between 5 and 15 minutes; and   wherein a 500 mg dose, upon oral administration to a population of healthy male subjects in the fasted state, provides a mean blood plasma Cmax of 50-120 ng/ml and a mean blood plasma AUC(0-∞) of 240-650 h*ng/ml.   
     
     
         36 . The unit dosage form of abiraterone acetate of  claim 35 , wherein the dissolution rate of the abiraterone acetate in the unit dosage form is such that when the unit dosage form is tested in 900 ml of pH 4.5 phosphate buffer with 0.12% sodium lauryl sulfate using USP Apparatus II at 75 rpm, at least 70% of the abiraterone acetate dissolves in between 5 and 10 min. 
     
     
         37 . The unit dosage form of abiraterone acetate of  claim 35 , wherein the 90% confidence interval of the mean blood plasma AUC (0-∞) is a value between 240 and 650 h*ng/ml when a 500 mg dose is administered to healthy male subjects in the fasted state. 
     
     
         38 . The unit dosage form of abiraterone acetate of  claim 35 , wherein the 90% confidence interval of the mean blood plasma Cmax is a value between 50 and 120 ng/ml when a 500 mg dose is administered to healthy male subjects in the fasted state. 
     
     
         39 . The unit dosage form of abiraterone acetate of  claim 35 , wherein the [D90] of the abiraterone acetate is greater than 300 nm and less than one of: 3000 nm, 2000 nm, 900 nm, 800 nm, and 700 nm. 
     
     
         40 . The unit dosage form of abiraterone acetate of  claim 35 , wherein the [D50] of the abiraterone acetate greater than 100 nm and is less than one of: 1000 nm, 800 nm, 500 nm, 400 nm, and 300 nm. 
     
     
         41 . The unit dosage form of abiraterone acetate of  claim 35 , wherein the [D4,3] of the abiraterone acetate is greater than 300 nm and less than one of: 1100 nm, 900 nm, and 800 nm. 
     
     
         42 . The unit dosage form of abiraterone acetate of  claim 35 , wherein the antioxidant comprises BHA and BHT.