The following may occur while taking this medication: upset stomach, diarrhea, constipation, changes in sex drive or ability, drowsiness, increased sweating, dizziness, heartburn, stomach pain, excessive tiredness, dry mouth, increased appetite, flu like symptoms, runny nose and sneezing LEXAPRO users should know: LEXAPRO may cause you to feel drowsy, less alert, and may affect your judgment, thoughts about suicide when you first start taking an antidepressant are possible, there is a possibility of worsening symptoms of depression or suicidal thoughts during the first several weeks of treatment (if this is the case, tell your doctor), there is a possibility of mood changes, make regular physician visits for at least the first 12 weeks of treatment with LEXAPRO, antidepressants may cause serious or life-threatening lung problems in newborn babies, do not stop taking LEXAPRO without first talking to your physician, do not give LEXAPRO to anyone younger than 12 years old without the advice of a physician, avoid taking tryptophan while you are taking LEXAPRO, avoid consuming alcohol while taking LEXAPRO as it can increase certain side effects, do not suddenly stop taking LEXAPRO without consulting your physician Stop using LEXAPRO and call your doctor immediately if you have any of the above side effects.