This study will evaluate the effects of two antidepression medications on sexual functioning.

Inclusion Criteria:

• Primary diagnosis of Major Depressive Disorder (MDD) with current duration lasting 12 weeks but no greater than 2 years.
• Subjects must engage in sexual activity that leads to orgasm at least once every two weeks.
• Subject must have normal orgasmic function and be willing to discuss with investigator.

Exclusion Criteria:

• Subjects that have arousal or orgasm dysfunction.
• Has previously failed to respond to two adequate trials of antidepressants in past 2 years.
• Subject has other unstable medical disorders.
• Subject has a positive urine test for illicit drug use at screening.