Compositions and methods for preparation of poorly water soluble drugs with increased stability
The present invention provides stable pharmaceutical compositions of poorly water soluble pharmaceutical agents and stabilizing agents which function to increase stability of the compositions. The use of stabilizing agents provide extended stability of nanoparticle suspensions and other formulations of poorly water soluble pharmaceutical agents such as docetaxel under certain conditions, for example upon dilution for administration.
1. A composition comprising 1) nanoparticles comprising docetaxel coated with a carrier protein, wherein said carrier protein is albumin and 2) a citrate selected from the group consisting of citric acid and sodium citrate, wherein stability of the composition is enhanced as compared to that of a composition without citric acid or sodium citrate.
2. The composition according to claim 1 , wherein the ratio of albumin to docetaxel is about 18:1 or less.
3. The composition according to claim 1 , wherein the nanoparticles in the composition have an average or mean particle size of no greater than about 200 nm.
4. The composition according to claim 1 , wherein the composition is a liquid suspension of docetaxel at a concentration of at least about 1 mg/ml.
5. The composition according to claim 1 , wherein the composition is a dry composition that can be reconstituted to a liquid suspension with at least about 1 mg/ml docetaxel.
6. The composition according to claim 1 , wherein the composition further comprises sodium chloride.
7. The composition according to claim 6 , wherein the composition comprises about 200 mM sodium citrate and about 300 mM sodium chloride.
8. The composition according to claim 1 , wherein the albumin is human serum albumin.
9. The composition according to claim 1 , wherein the citrate is sodium citrate.
10. The composition according to claim 1 , wherein the pH of the composition is no less than about 6.
11. The composition according to claim 1 , wherein the composition is stable for at least about 24 hours following reconstitution or rehydration.
12. The composition according to claim 8 , wherein the composition further comprises sodium chloride.
13. The composition according to claim 8 , wherein the citrate is sodium citrate.
14. The composition according to claim 13 , further comprising sodium chloride.