A sustained-release preparation comprising a bioactive substance having an acidic group and a biodegradable polymer having an optionally protected basic group improves the rate of incorporation of the bioactive substance, suppresses its leakage early after administration, and exhibits constantly suppressed release for an extended period of time.
一种由具有酸性基团的
生物活性物质和具有可选择保护的碱性基团的可
生物降解聚合物组成的缓释制剂可提高
生物活性物质的结合率,抑制其在用药后早期的泄漏,并在较长时间内表现出持续的抑制释放。