另一种在老鼠实验中用到的药物——野靛碱，在东欧有售，用于戒烟治疗，但不在美国销售。
The other drug used in the mouse experiments, cytisine, is sold in Eastern Europe for smoking cessation but not in the U. S.
可惜的是，对医疗销售的国际条约限制了替代实验的开展。
Sadly, international agreements on the sale of medical treatments limit the use of alternatives.
今天，疟原虫已对仅含青蒿素的抗疟疾药物产生耐药性，世卫组织要求实验室停止对单药疗法的市场营销和销售。
Today, the parasite has become resistant to anti-malarials that contain only artemisinin and WHO has requested laboratories to end the marketing and sale of single-drug treatments.
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