This is my fifth day of taking celexa 20mg. I know they usually say it takes awhile before it starts to work but I already feel a major difference . The only side effect I am feeling is insomnia. The first day I was so sleepy. During the day, I get sleepy for about a hour and it wears off. When I get upset, something clicks in my brain and it decreases. No crying spells or anger outbursts. I have more patience now with my child who has ADHD. I also experience dizziness but it goes away after a while. I am able to socialize more before I totally was isolated. I have no desire to have sex but small price to pay for me for being able to function everyday.