这是因为活性治疗药物成分不是多巴胺本身,而是一些前体药物.

This is because the active <em>drug</em> <em>ingredient</em> is not dopamine itself but arious precursor molecules.

公司会改变药物成分的.

Companies can change the ingredients.

口香糖还含有药物成分。

Gum can also contain medicine.

舒洛地特的药物成分可以防止糖尿病老鼠的病理性变化及蛋白尿的发生。

Components of the drug sulodexide prevent pathological changes and proteinuria in diabetic rats.

目的：药膳是一种含有药物成分的膳食，它既有保健作用又有治疗作用。

OBJECTIVE: Medicine accommodation is a kind of meal containing drug component, and it has the action of both health care and treatment.

鼻滴剂或吸入剂含有可收缩血管帮助鼻窦畅通的药物成分。

Nose drops or inhalations containing drugs that contract Blood vessels help drain the sinuses.

还透露，均由一发明化合物和药学上可接受的载体药物成分。

Also disclosed are pharmaceutical compositions comprising a compound of the invention and a pharmaceutically acceptable carrier.

RESOMER聚合物可用作有效药物成分的可生物降解载体。

RESOMER? polymers are biodegradable carriers for active pharmaceutical ingredients.

结论：该鉴定方法对药物成分的结构分析和临床用药具有指导意义。

Conclusion: This work has guiding significances for structural analysis of components and clinically choosing medicine.

以这些药物成分为原料生产的不符合要求的药品往往出现在发展中国家的药房并在互联网上销售，而越来越多的美国人转向互联网寻找廉价药品。

The substandard formulations made from those ingredients often end up in pharmacies in developing countries and for sale on the Internet, where more Americans are turning for cheap medicine.