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The risk of weight gain is a major concern for patients initiating antidepressant treatment. However, whether specific medications are more or less likely to cause weight gain is unclear. The association is not a simple cause–effect relationship since many factors can contribute to weight gain, including depression itself.1 A 2010 systematic review suggested that amitriptyline, mirtazapine and paroxetine were associated with a greater risk of weight gain than other antidepressants.2 In contrast, some weight loss was found to occur with fluoxetine and bupropion. Weight loss associated with bupropion was observed during acute and maintenance treatment whereas that for fluoxetine was seen only during acute treatment.2 If weight loss occurs during long-term bupropion treatment, this medication may be a preferred option for some patients. However, reflecting the broader literature, most studies in this systematic review …
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