For children with autism spectrum disorders (ASD, also known as Pervasive Developmental Disorders - PDDs), repetitive behaviors are common and frequently interfere with functioning in the home as well as in social and educational settings. These behaviors may involve repetitive movements, rigid routines, repetitive play, and even repetitive speech. These behaviors may be associated with high levels of anxiety, severe tantrums. Self-injury can occur when these behaviors and routines are interrupted.~Participants will be randomly assigned to receive citalopram or placebo (administered as liquid), and carefully followed every two weeks. At the end of 12 weeks, children who have responded to treatment will be given the opportunity to continue in the study, with monthly visits, for an additional 24 weeks. Children who received placebo and did not respond to treatment at 12 weeks will be given the opportunity to receive a carefully monitored 12 week course of citalopram.
This study will determine the efficacy and safety of citalopram compared to placebo in the treatment of children with autism.