Mirtazapine Therapy for a Patient With Weight Loss and Gastroparesis Associated With Limited Systemic Sclerosis.

Gastroparesis may be present in individuals with systemic sclerosis. In the United States, metoclopramide is the only medication approved for treating gastroparesis. Our case involves using mirtazapine therapy to help with weight loss and gastroparesis associated with systemic sclerosis. A 70-year-old female with limited systemic sclerosis and sicca syndrome began experiencing weight loss, dysphagia, nausea, and abdominal fullness. Neither an esophageal dilation procedure nor six weeks of metoclopramide therapy alleviated her symptoms. However, 15 mg of mirtazapine once daily provided some symptomatic relief. A gastric emptying scan confirmed gastroparesis. The dose of mirtazapine was later increased to 30 mg once daily. With the mirtazapine therapy, the patient experienced both symptomatic improvement and weight gain benefits. Mirtazapine therapy has anti depressive, appetite stimulating, anti-emetic, and prokinetic benefits. Consideration of mirtazapine therapy for patients with weight loss and gastroparesis associated with systemic sclerosis may be beneficial.