Previously, we found an anxiolytic effect of ziprasidone augmentation to escitalopram (compared to placebo augmentation) in patients with depression in an 8-week, randomized, double-blind, parallel-group, placebo-controlled trial. Here, we conducted a post-hoc analysis, comparing changes in the Hamilton Depression (HDRS) and Anxiety (HAM-A) rating scales between patients with anxious depression versus nonanxious depression, using a moderator analysis. HDRS total change scores from baseline and endpoint were not significantly different (interaction term p=0.91) in patients with anxious depression on ziprasidone augmentation (n=19; −9.1 ± 4.9) or placebo (n=19; −6.1 ± 8.9) versus patients without anxious depression on ziprasidone (n=52; −5.5 ± 6.7) or placebo (n=49; −2.3 ± 4.5). There was a trend towards statistical significance (interaction term p=0.1) in favor of patients without anxious depression for a difference in HAM-A total change scores from baseline to endpoint (patients with anxious depression on ziprasidone augmentation (n=19; −2.7 ± 5.3) or placebo (n=19; −3.3 ± 5.8) versus patients without anxious depression on ziprasidone (n=51; −3.9 ± 6.6) or placebo (n=44; −0.9 ± 4.7)). Ziprasidone augmentation was equally efficacious in treating depression in patients with versus without anxious depression. However, the observed anxiolytic effect for patients with higher anxiety was not clinically significant.