The selective serotonin (5-hydroxytryptamine; 5-HT) reuptake inhibitors (SSRIs) are extensively used in the treatment of depression, panic disorder and obsessive-compulsive disorder, and are now being evaluated in the treatment of a number of other psychiatric disorders. The aim of this study was to investigate the pattern of adverse reactions reported on SSRIs in Sweden and assess possible risk factors associated with the occurrence of adverse reactions to these agents.