Question

What is the most useful way a medicine can be classified?

Answer 1

Answer:

Drugs are classified by how they work, what they treat, and their chemical structure. Some drugs fit in more than one category. Others are grouped together under some classification methods but not others.

Explanation:

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Answer 2

Answer:

how they work, what they treat, and their chemical structure. 

Explanation:

Other ways to classify medicines are by mode of action, route of administration, biological system affected, or therapeutic effects.