My husband was on Celexa for about 7 weeks and started having severe side effects. His personality changed, he was sweating, couldn t sleep. He went 5 days straight 2 weeks in a row not being able to sleep. His eyes were dilated, he had confusion. We think that someone was putting amphetamines in his coffee because after he had coffee, about 30-60 minutes later,he was all over the place with energy he shouldn t have had due to lack of sleep. I have seen him go without sleep before but it was only about 40 hours and when he would sit down he would fall right to sleep.