有效成分(active ingredient)又称活性成分,是药物或杀虫剂中具有生物活性的成分。在药学领域中称为活性药物成分(active pharmaceutical ingredient,API)或原料药(bulk drug)[1];若是天然产物,则常称为活性物质(active substance)[2]。
制药界的原料药,由化学合成、植物提取或者生物技术所制备,但病人无法直接服用的物质,一般再经过添加辅料、加工,制成可直接使用的药物。
参考
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