“…Some case reports suggest that clozapine, olanzapine, quetiapine and risperidone improve symptoms of obsessive-compulsive disorder (OCD) and panic disorder, while an equal number of reports indicate the worsening effects of each drug on these disorders (Brooke et al, 2005). For other anxiety disorders, such as post-traumatic stress disorder (PTSD), some studies find that atypicals improve certain symptoms (e.g., hyperarousal and reexperiencing) (Hamner, 1996, Monnelly et al, 2003, Petty et al, 2001), while others failed to reach the same conclusion (Butterfield et al, 2001, Hamner et al, 2003).…”