It personal did not do well on citalopram and had some strange effects. Most likely what I have is an allergy to the medication. I got very confused and I would know what I wanted to say in my mind but when I tried to speak I could not seem to get the words out. I also experienced lightheadedness. On the other hand my son took this medicine and he didn't show any adverse side effect. The medicine just didn't really seem to do anything.