METHOD OF FORMING PROLONGED-RELEASE INJECTABLE STEROIDS
First Claim
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1. A method of forming prolonged-release injectable steroids comprising:
- providing a steroid composition;
providing a bioabsorbable polymer;
providing a solvent;
forming a solution from the steroid composition, the bioabsorbable polymer and the solvent;
forming droplets from the solution; and
removing the solvent from the droplets to cause the droplets to form microspheres.
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Abstract
A method of forming prolonged-release injectable steroids. The method includes providing a steroid composition, a bioabsorbable polymer and a solvent. A solution is formed from the steroid composition, the bioabsorbable polymer and the solvent. Droplets are formed from the solution. The solvent is removed from the droplets to cause the droplets to form microspheres.
9 Citations
31 Claims
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1. A method of forming prolonged-release injectable steroids comprising:
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providing a steroid composition; providing a bioabsorbable polymer; providing a solvent; forming a solution from the steroid composition, the bioabsorbable polymer and the solvent; forming droplets from the solution; and removing the solvent from the droplets to cause the droplets to form microspheres. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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- 17. Prolonged-release injectable steroids comprising a microsphere comprising a steroid composition and a bioabsorbable polymer, wherein the steroid composition is released from the bioabsorbable polymer at a relatively constant rate that is substantially independent of a concentration of the steroid composition in the bioabsorbable polymer.
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25. A method of simulating drug release from a microsphere comprising:
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preparing an eluant solution from 1,4-dioxane; flowing the eluant solution past a plurality of microspheres containing a steroid composition and a bioabsorbable polymer; eluting the drug composition from the microspheres into the eluant solution; and collecting the eluted steroid composition.
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- 26. The method of claim 26, wherein the steroid composition comprises methylprednisolone acetate, triamcinolone acetonide, dexamethasone sodium phosphate, betamethasone sodium phosphate, betamethasone acetate and combinations thereof.
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31. The method of claim 31, wherein the glass beads are maintained at a temperature of less than about 10°
- C.
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