Abstract
This study aimed to elucidate medical weight-loss outcomes in patients unexposed or exposed to psychotropic medication(s). This retrospective cohort study evaluated weight-loss outcomes of completers treated at an academic weight-management center between April 1, 2014, and April 1, 2016. Patients were classified as either unexposed (not prescribed psychotropic medication) or exposed (prescribed psychotropic medication) based on use of antidepressants, mood stabilizers, or antipsychotics during the study. Of 1,932 patients seen during the study period, 885 were eligible for inclusion, of whom 619 (70.0%) were unexposed and 266 (30.0%) were exposed to psychotropic medications. In the unexposed and exposed groups, the mean age, sex distribution, proportion with type 2 diabetes, initial BMI, and number of weight-loss medications prescribed were similar. At 12 months, the unexposed group lost 1.6% more weight on average than the exposed group (9.1% [SD 7.6%] vs. 7.5% [SD 8.1%], respectively; P = 0.02); 71.0% and 41.2% of the unexposed group achieved ≥ 5% and ≥ 10% weight loss at 12 months, respectively, compared with 63.1% and 31.8% in the exposed group at 12 months (P = 0.04 at 5%; P = 0.02 at 10%). Exposure to psychotropic medications was associated with diminished weight loss in patients with medically managed overweight and obesity.
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