5. Taking an FDA approved GAD treatment (escitalopram 10 to 20 mg total daily dose, paroxetine 20 to 50 mg total daily dose, duloxetine 60 to 120 mg total daily dose, or venlafaxine 75 to 225 mg total daily dose) at a stable FDA approved dosage for at least the two consecutive months in the current episode immediately prior to the screening visit. Sertraline or citalopram are also permitted as background treatment for GAD at doses of 50 to 200 mg total daily dose and 20 to 40 mg total daily dose, respectively.