Long-term sustained-release preparation
AssigneeSumitomo Pharmaceuticals Company, Limited
InventorsYoshiya Yamahira, Keiji Fujioka, Shiegeji Sato, Yoshihiro Takada
Life of this patent
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Abstract
A solid sustained-release preparation in the form of a needle-like or bar-like shape, which consists essentially of an active ingredient and a pharmaceutically acceptable biodegradable carrier (e.g. proteins, preferably collagen, gelatin, and a mixture thereof). The sustained-release preparation can be administered to the body or implanted into the body by injection or an injection-like method and can release the active ingredient at an effective level for a long period of time when administered.
Claims20
A method for the preparation of a solid sustained-release preparation, which comprises mixing under aqueous conditions a physiologically active ingredient that is unstable to heat and a pharmaceutically acceptable biodegradable protein carrier to incorporate the active ingredient in a carrier matrix to a degree sufficient to provide sustained-release properties;
- drying the resulting mixture;
- and then forming the dried material into the form of a needle-like or bar-like shape.
Dependencies are inferred from the claim text.