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A drug is any chemical substance, other than a food or device, that affects the function of living things. Technically, vitamin E, oxygen, and cocaine are all examples of drugs. Various drugs can be used to treat illness, or they can be used recreationally to alter behavior and perception.

The definition is somewhat fuzzy, because many substances which are not typically considered drugs are indeed active substances (ex. caffiene, nicotine, and even chocolate). Additionally, there are thousands of substances in foods and "nutritional supplements" which affect the function of living things. Many illegal and recreational drugs (such as cocaine, opium, and ephedra) could potentially be considered "foods" because they do have caloric content. That being said, the popular definition of a drug is any substance which causes an altered state of mind, caffiene and alcohol excluded. This may or may not include medications, which are strictly used to cure illness and by definition not used for recreation.

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Breast Cancer News: Four commonly used chemotherapy drugs disrupt birth of new brain cells, shows study: Researcher... http://bit.ly/5x4WYJ
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Breast Cancer News: Four commonly used chemotherapy drugs disrupt birth of new brain cells, shows study: Researcher... http://bit.ly/5x4WYJ
Oncology News: Four commonly used chemotherapy drugs disrupt birth of new brain cells, shows study: Researchers hav... http://bit.ly/5x4WYJ
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Oncology News: Four commonly used chemotherapy drugs disrupt birth of new brain cells, shows study: Researchers hav... http://bit.ly/5x4WYJ
Chemotherapy: Autumn in January » Blog Archive » A letter to my chemotherapy drugs http://bit.ly/64lpAZ
lefernald (Fernald Leeanne) Fri, 18 Dec 2009 03:36:23 -0000
Chemotherapy: Autumn in January » Blog Archive » A letter to my chemotherapy drugs http://bit.ly/64lpAZ
Ϟ Best Antioxidant Vitamin Supplements • Discount Vitamin Shop ...: of children taking chemotherapy drugs in ou.. http://bit.ly/4zzZbu
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Ϟ Best Antioxidant Vitamin Supplements • Discount Vitamin Shop ...: of children taking chemotherapy drugs in ou.. http://bit.ly/4zzZbu
Why Is Grapefruit Not Recommended With Chemotherapy Drugs, Such As Vinblastine? - http://tinyurl.com/ye9nngs
chemicallok (chemicall) Wed, 16 Dec 2009 08:39:25 -0000
Why Is Grapefruit Not Recommended With Chemotherapy Drugs, Such As Vinblastine? - http://tinyurl.com/ye9nngs
Chemotherapy Cancer Treatments & Side Effects : Types Of Chemotherapy Drugs: There is a variety of drugs used .. http://bit.ly/7XLMO2
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Chemotherapy Cancer Treatments & Side Effects : Types Of Chemotherapy Drugs: There is a variety of drugs used .. http://bit.ly/7XLMO2

 
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CancerBACUP: Chemotherapy Drugs - Information about chemotherapy and its effects, including details about individual drugs.
Meta Description: [ An overview of the chemotherapy information section ]

Chemotherapy Drugs - Information on specific cancer chemotherapy medications, from the Cleveland Clinic Foundation.
Meta Description: [ Chemotherapy Drugs - To find the chemotherapy drug that you are taking, click on the appropriate button below to search the list alphabetically by drug name or acronym. The drug name can be either the generic name of the drug OR the trade name. For example, Tylenol is the trade/brand name of acet... ]

What Are the Different Types of Chemotherapy Drugs? - American Cancer Society tells about the different types of drugs used to treat cancer.
Meta Description: [ Chemotherapy drugs are divided into several categories based on how they affect specific chemical substances within cancer cells... ]

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