Anti-depressant medications have weight related side effects (7-9). Mirtazapine has been shown to have side effects of increased appetite and increased weight in cancer subjects studied for use with depression and nausea. (10-13). These results appeared to range from changes in appetite to changes seen in metabolic processes such as changes in the cytokine system to reduce inflammation seen in cachectic patients. Therefore, using mirtazapine in cancer patients even without depression may help to stop unwanted weight loss and increase survival by allowing patient to complete prescribed treatment.