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blogs.nature.com/…/drugs_drugs_and_more_drugs/ Or: http://images.stanzapub.com/readers/2009/06/20/pillsfillmorephotography_1.jpg A drug is any psychoactive chemical substance which changes the behavior, feeling and physiology of a user. Drugs can influence how a person thinks, feels and behaves. Drug can exist in many forms such as in powder, liquid, pill or herbal form. Drugs can be consumed, inhaled, smoked or injected into the body. A drug may be useful or harmful to t
