A 10-week Study Evaluating the Efficacy and Safety of PD 0332334 for the Treatment of Generalized Anxiety Disorder (3)

Inclusion Criteria: * Diagnosis of GAD (Diagnostic and Statistical Manual-IV \[DSM-IV\], 300.02) as established by the clinician (psychiatrist or licensed clinical psychologist) who has interviewed the subject using all sources of data including the Mini International Neuropsychiatric Interview (MINI) for DSM-IV Axis I disorders and other clinical information. Subjects with specific phobia(s) (as defined in DSM-IV) or dysthymic disorder will be allowed in the study. * Subjects must have a HAM-A total score \>/= 20 at the screening (V1) and randomization (V2) visits. Subjects must also have a Covi Anxiety Scale score of \>/= 9 and a Raskin Depression Scale score \</= 7 at the Screening (V1) visit to ensure predominance of anxiety symptoms over depression symptoms. Exclusion Criteria: * Subjects with evidence or history of clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular, hepatic, pancreatic, neurologic, active infections, immunological, or allergic disease (including drug allergies). * Any of the following current (within the past 6 months through the present) DSM-IV Axis I diagnoses: Major depressive disorder; Obsessive compulsive disorder; Panic disorder; Agoraphobia; Posttraumatic stress disorder; Anorexia; Bulimia; Caffeine-induced anxiety disorder; Alcohol or substance abuse or dependence unless in full remission for at least 6 months; Social anxiety disorder. * Any of the following past or current DSM-IV Axis I diagnoses: Schizophrenia; Psychotic disorder; Delirium, dementia, amnestic and other clinically significant cognitive disorders; Bipolar or schizoaffective disorder; Cyclothymic disorder; Dissociative disorders. * Antisocial or borderline personality disorder. * Serious suicidal risk per the clinical investigator's judgment.