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Professor Marc Lewis is a former drug addict, who recovered and now specialises in the neuroscience of addiction. His latest book The Biology of Desire: Why Addiction is not a Disease has divided the medical profession, as it refutes the medical view of addiction as a brain disease.
Marc Lewis tells Kathryn Ryan that it is, in fact, harmful to call addiction a disease, when it is actually a (very entrenched) learned habit that can be broken.
