这种药物有一个很大的限制因素，其药效只能持续6个小时。
This drug has one important limitation. Its effects only last six hours.
草本植物的医药效用数不胜数。
强效纯可卡因是一种药效极强、容易使人上瘾的可卡因制剂。
Crack is a highly potent and addictive derivative of cocaine.
一些补品会干扰处方药的药效，过量会导致神经病变，严重的话，还会造成器官损伤。
Some supplements can interfere with prescription drugs and too much can cause neuropathy and in severe cases, organ damage.
为了使三联体结合 Mg2+，必须电离药效团生物等位体。
For the triad to bind the Mg2+, a pharmacophore bioisostere has to be ionized.
国家癌症协会正在努力增强药效。
The National Cancer Institute is trying to strengthen the shots.
目的研究妇科千金软胶囊的主要药效作用。
Objective To investigate the main therapeutic effects of Fuke Qianjin Soft Capsule (FQSC).
这是因为这类试验主要关注测试药物的安全性而不是药效。
That is because such trials are concerned mainly with testing a drug’s safety, not its efficacy.
这种产品没有经过适当溶解，可能导致药效降低。
The products did not dissolve properly, a problem that could cause the pills to work less effectively.
研究者还称此项研究增加了对于降低药效的临床试验的关注。
Researchers also say the study raises concerns about clinical trials used to determine the effectiveness of drugs.
抗疟药效力方面的任何变化应促使适当修订一国的治疗政策。
Any change in efficacy of antimalarial drugs should prompt an appropriate update in a country's treatment policy.
即便在有药效的时候，药物也并不会对所有人有效。
The drugs don't work for everyone, even when they are effective.
对药物的选择考虑到了患病率、安全性、药效以及相对成本效益。
They are selected with regard to disease prevalence, safety, efficacy, and comparative cost-effectiveness.
米切尔说，更关键的问题是病人每多等15分钟，药效就会减半。
More crucial: the effectiveness of the drugs is reduced by half every 15 minutes the patient is waiting, Mitchell said.
这些小片剂每片含有一滴盐酸，药效持续四个小时左右。
These small tablets contain one drop of hydrochloric acid and they last about four hours.
这中化合物还需要在小鼠上实验，以及验证在非人灵长类的药效。
The compound has not yet been tested in mice, and would still need to show it is effective in non-human primates.
“你也不会希望药效持久至终生终世。”玛格·丽特说。
他的血压很高，并且医生给他开了比以前药效更强的药。
His blood pressure was up and stronger medicine was prescribed.
此外，服药前后一小时不要喝牛奶，以免影响药效释放。
Also, milk should not be drunk an hour before or after taking pills or it will impact on the effectiveness of the medicine.
对药物的选择考虑到了患病率、药效证据、安全性以及相对成本效益。
They are selected with regard to disease prevalence, evidence of efficacy, safety, and comparative cost-effectiveness.
“听说你有一种药效神奇无可比拟的药物，”艾伦问道，“这是真的吗？”
"Is it true, " asked Alan, "that you have a certain mixture that has-er-quite extraordinary effects?"
我们的最终目标是利用一系列相互关联的方法使我们最大化药效并减少其危害。
Our ultimate aim is to use a number of inter-related methods to allow us to maximise the benefits of medicines and minimise the harm.
它的药效不像安眠药那么强，但可以直接作用于你的生物钟，把它调到睡眠档。
It's not as strong as a sleeping pill, but it directly affects your body's internal clock and nudges it toward sleep.
它还概述了世卫组织为监测全球抗疟药效力和正在形成的耐药模式制定的新的标准化方法。
It also Outlines new standardized methods developed by WHO for monitoring antimalarial drug efficacy and emerging resistance patterns worldwide.
加州大学伯克利分校的N .古哈与同事们也发现豆类食品的作用并不会干涉它莫西芬的药效。
Guha N. at University of California at Berkeley and colleagues also found use of soy foods does not seem to interfere with tamoxifen efficacy.
在第一次服用后的数周内，通过阻止肿瘤形成内部所需的蛋白质，药效似乎有所显现。
Within weeks of the first dose, it appeared to work, by preventing tumors from making proteins they need to survive.
在第一次服用后的数周内，通过阻止肿瘤形成内部所需的蛋白质，药效似乎有所显现。
Within weeks of the first dose, it appeared to work, by preventing tumors from making proteins they need to survive.
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