Stabilized pharmaceutical composition
DCFirst Claim
1. A method of formulating a taxol solution for injection in which the taxol does not readily degrade, comprising the following steps:
- mixing acid with a carrier material to form a first carrier solution; and
mixing taxol with the first carrier solution to form a taxol solution having a pH of less than 8.1 whereby the taxol in the taxol solution does not readily degrade.
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Abstract
A pharmaceutical formulation of taxol and polyethoxylated castor oil is disclosed to be relatively acidified to pH of less 8.1 and preferably within a pH range of 5 to 7, inclusively, by an acidifying agent. Ethanol is optionally included in the formulation which is adapted for use in a body for the treatment cancer. A formulation method is disclosed and includes the step of mixing an acid with a carrier material, such as polyethoxylated castor oil, to form a carrier solution after which taxol is added in an amount such that the resulting pH is less than 8.1 and preferably in a pH range of 5 to 7. Ethanol may optionally be slurried with the taxol before mixing with the carrier solution. A variety of acidifying agents, a preferred one being anhydrous citric acid, are described.
64 Citations
61 Claims
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1. A method of formulating a taxol solution for injection in which the taxol does not readily degrade, comprising the following steps:
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mixing acid with a carrier material to form a first carrier solution; and mixing taxol with the first carrier solution to form a taxol solution having a pH of less than 8.1 whereby the taxol in the taxol solution does not readily degrade.
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- 2. An improved pharmaceutical carrier composition useful for combining with taxol to yield a taxol formulation, the improvement comprising mixing an acid with said carrier composition.
- 26. A pharmaceutical taxol composition comprising taxol and a pharmaceutically-acceptable carrier wherein said pharmaceutical taxol composition has a pH less than or equal to 7.0.
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32. An improved method of formulating a pharmaceutical taxol solution, such that the taxol does not readily degrade, comprising the following steps:
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mixing taxol with a carrier material to form a taxol solution; and reducing the pH of said taxol solution to a level whereby the taxol solution is stabilized such that at least 95% of the taxol potency is retained when the composition is stored at 40°
C. for seven (7) days. - View Dependent Claims (33, 34)
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- 35. An article of manufacture comprising a container and a pharmaceutical formulation contained therein, said pharmaceutical formulation comprising a pharmaceutically-acceptable carrier and taxol, wherein said pharmaceutical formulation has a pH of about 7 or less.
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40. A pharmaceutical taxol composition comprising:
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taxol; polyethoxylated castor oil; and ethanol, wherein said taxol composition has a pH sufficient to improve the stability of said taxol such that at least 95% of the taxol potency is retained when the composition is stored at 40°
C. for seven (7) days.
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41. A pharmaceutical taxol composition comprising:
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taxol; polyethoxylated castor oil; and an acid in sufficient amounts to improve the stability of the taxol such that at least 95% of the taxol potency is retained when the composition is stored at 40°
C. for 7 days. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61)
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Specification