药物的生物利用率(度)是指某种药物制剂在应用后,其中所含的药物以不变化的形式进入循环系统的百分数。这个概念包括药物进入循环的量也包括进入的速度。而不涉及到药物进入循环以后所发生的一系列变化,如分布、结合、生物转化以及排泄等。这些过程虽然都能影响药物的有效浓度,但并不在生物利用率讨论范围之内。简单地说,药物的生物利用率是衡量制剂中所含药物吸收率的尺度,是以检品与标准制剂的吸收率相对比所测得的相对值,是保证药品质量的一个重要标准。对确保病人安全有效的用药和促进药品生产发展有着重要意义。生物利用率不 The bioavailability (degrees) of a drug refers to the percentage of drug that enters a circulating system in a non-changing form after the drug has been applied. This concept includes the amount of drug that enters the circulation as well as the rate of entry. It does not involve a series of changes that occur after the drug enters the circulation, such as distribution, binding, biotransformation and excretion. Although these processes can affect the effective concentration of drugs, but not within the scope of bioavailability. In simple terms, the bioavailability of a drug is a measure of the rate of absorption of a drug contained in a preparation, and is the relative value measured in relation to the absorbance of the sample and standard preparation. It is an important criterion for ensuring the quality of a drug. It is of great significance to ensure safe and effective medication for patients and promote the development of drug production. Bioavailability is not