| 摘要 |
The invention relates to a delivery device for the controlled release of a therapeutically active agent, especially a progestin or an estrogen, over prolonged period of time, said device comprising a core comprising said therapeutically active agent, and a membrane encasing said core wherein said membrane is made of an elastomer. According to the invention, the elastomer is a siloxane-based elastomer comprising 3.3.3-trifluoropropyl groups attached to Si-atoms of the siloxane units.
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