An Eight-week Study to Evaluate the Efficacy and Safety of 2 Doses of Saredutant in Patients With Generalized Anxiety Disorder

An Eight-Week, Multicenter, Randomized, Double-blind, Placebo-controlled Study, to Evaluate the Efficacy, Safety and Tolerability of Two Fixed Doses (100 and 30 mg Once Daily) of Saredutant in Patients With Generalized Anxiety Disorder

The primary objective is to evaluate the efficacy of two fixed doses (100 mg and 30 mg once daily) of saredutant compared to placebo in patients with generalized anxiety disorder. The secondary objectives are to evaluate the efficacy of saredutant on disability and quality of life in patients with generalized anxiety disorder, and to evaluate blood levels of saredutant.

Inclusion Criteria:

• Diagnosis of generalized anxiety disorder as defined by Diagnostic and Statistical Manual of Mental Disorders (DSM-IV-TR) criteria and confirmed by the Mini International Neuropsychiatric Interview (MINI) Plus Generalized Anxiety Disorder module.

Exclusion Criteria:

• Total score of less than 22 on the HAM-A.
• Montgomery-Asberg Depression Rating Scale (MADRS) total score greater than 18.
• Patients with a current history (within 6 months) of major depressive disorder or history or presence of bipolar disorders or psychotic disorders.
• Patients with alcohol dependence or abuse or substance dependence or abuse in the past 12 months except nicotine or caffeine dependence.
• Patients who have used the following prior to entry into Acute Phase: antipsychotics within 3 months, antidepressants including Monoamine Oxidase Inhibitors (MAOIs) within 1 month, anxiolytics within 2 weeks, mood-stabilizer (lithium, anticonvulsants) within 1 month, and/or high dose or prolonged benzodiazepine (continuous use for 3 months prior to admission) use.

The investigator will evaluate whether there are other reasons why a patient may not participate.