Clinical Psychologist Alain Brunet of McGill University in Montreal doesn't usually torture his patients. But lately he has been pressing those with post-traumatic stress disorder, or PTSD, to relive emotionally scarring incidents. For some it's rape, others battlefield trauma. When his patients get particularly upset—crying, shaking, blood pressure rising—he gives them a 25-year-old hypertension drug called propranolol. The idea, though, is not to lower their blood pressure. Brunet's goal is much more profound: to wipe away the trauma of bad memories.
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