The father of psychoanalysis, Sigmund Freud

 ā€œNo less of a figure than the young Dr. Sigmund Freud was enthralled with cocaine for a while, relying on it, ā€˜to control his intermittent depressed moods, improve his general sense of well being, help him relax in tense social encounters, and just make him feel more like a manā€™. Freud was slow to accept that cocaine could create a dependence problemā€. - extract from the book, In the realm of hungry ghosts.