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Heroin, the most famous drug of the 1980s, has handed its place of honour to cannabis, cocaine, tobacco and alcohol. These substances have real, harmful effects on the body of people who take them, causing various changes that increase steeply when they are used compulsively and recreationally. Rafael Maldonado, a lecturer in pharmacology at the UPF, explains how the brain and its neurones change through drug abuse.
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