Lexapro blocks the re-absorption of serotonin by the first nerve cell. Escitalopram helps to restore the brain's chemical balance by increasing the amount of serotonin, a chemical messenger in the brain that helps maintain mental balance. You discover something that will profoundly change your life in positive ways, then Lexapro is for you. As an anxiety medicine and they also appreciate that Lexapro is a small pill that is easy to swallow. Lexapro is an antidepressant in a group of drugs called selective serotonin reuptake inhibitors. Depression by increasing serotonin levels with minimal effect on many of the other chemicals in the brain believed to influence mood. There have been some complaints about it, like its alleged contributions to weight gain and its high price. Lexapro blocks the re-absorption of serotonin by the first nerve cell.