Lexapro is from the family of drugs known as SSRI that is believed to influence mood. Lexapro helps to restore the brain's chemical balance by increasing the supply of a chemical messenger in the brain called serotonin. Lexapro appears to relieve the symptoms of depression and anxiety by increasing serotonin with minimal effect on many of the other chemicals in the brain.
Kitt, Moderator: Anxiety/Panic & Depression& GERD Forums*~*
You are right about avoiding missing your dose as the SSRIs and SSNIs can cause some quick drops in blood levels and withdrawal side effects can start quickly.
Good advice and keep on posting.