活性分子

原料药（API）是指药品中具有生物活性并产生治疗作用的物质或混合物。在制药生产中，原料药通过受控的化学、生物或生物技术过程合成、提取或纯化，以满足严格的纯度、效力和稳定性标准。它们是片剂、胶囊或注射剂等成品剂型的核心成分。

原料药通过与体内特定生物靶点（如受体、酶）相互作用来调节生理过程。其疗效取决于化学结构、溶解度、生物利用度和药代动力学特性。在生产中，原料药在良好生产规范（GMP）条件下生产，以确保一致性、纯度和符合监管标准。

APIs work by interacting with specific biological targets (e.g., receptors, enzymes) in the body to modulate physiological processes. Their efficacy depends on chemical structure, solubility, bioavailability, and pharmacokinetic properties. In manufacturing, APIs are produced under Good Manufacturing Practice (GMP) conditions to ensure consistency, purity, and compliance with regulatory standards.