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Although Sigmund Freud's theories of the unconscious mind continue to influence modern psychoanalysts, it would be interesting to know if cocaine abuse altered his results. If dreams, according to Freud, are a fulfillment of unconscious wishes, then what is the advantage of a drug, such as cocaine, that alters the nervous system's reward mechanism? If cocaine was a component in many of Freud's case studies, then how could these results benefit modern psychologists? It seems that by using a drug that alters the NS, the user could not accurately determine where their dreams originated in the unconscious.