• Change in score on a Social Anxiety Disorder rating scale following 12 weeks of treatment.
  

• Change in score on a number of rating scales following 12 weeks of treatment assessing symptomatic, behavioural and functional parameters which together provide a more complete description of the disorder.
  

Inclusion criteria:

• Primary diagnosis of Generalised Social Anxiety Disorder as defined in DSM-IV.
• Capable of giving informed consent and willing to comply with the study requirements.
• Women of childbearing potential must agree to one of a number of defined acceptable methods of birth control.

Exclusion criteria:

• Primary diagnosis within the past 6 months of another Axis 1 disorder such as Major Depression or another anxiety disorder.
• Use of medications for a psychiatric condition including herbals in the past 2-12 weeks according to medication type.
• Subjects who, in the investigator's judgement pose a current, serious suicidal or homicidal risk or have made a suicide attempt within the past 6 months.
• Subjects who currently meet or who met within 6 months prior to screening DSM-IV criteria for substance abuse or subjects who currently meet or who met within 6 months prior to screening DSM-IV criteria for substance dependence (other than nicotine).
• Significantly abnormal blood or urine laboratory tests or electrocardiogram (ECG).