Biomedical Research In The Drugs Field

Why is it that certain people use drugs in the first place and then why do some become dependent following repeated use while others do not? What are the possible implications of the current state of affairs of research from a biomedical or more aptly put, a Neuroscience perspective, including an ethical point of view? These are questions the author attempts to answer as the biomedical or neuroscience research in the drug field is a fast moving area with ethical implications that have arisen as a result of the conduct of such research.