Granisetron Transdermal System for Gastroparesis: A Prospective Study using the GCSI-Daily Diary
Granisetron for gastroparesis
Granisetron transdermal system (GTS; Sancuso®), a patch delivering a 5-HT3 receptor antagonist, has been shown to improve nausea and vomiting in gastroparesis. Recent FDA guidance on gastroparesis suggests daily scoring of symptoms to show efficacy. Aim: Determine the efficacy and onset of therapeutic response of GTS in improving specific symptoms and overall symptoms of gastroparesis in patients with gastroparesis using a daily symptom diary for gastroparesis. Methods: Symptomatic patients with diabetic or idiopathic gastroparesis with nausea and/or vomiting were enrolled. Gastroparesis Cardinal Symptom Index Daily Diary (GCSI-DD) captured severity of symptoms at baseline for one week and during two weeks of treatment with GTS. Key Results: 14 patients (age 41.5±17 years; 13 females) with refractory gastroparesis (5 idiopathic, 9 diabetic) participated in this open label study. Nausea, early satiety, postprandial fullness, abdominal pain, GCSI-DD composite score, and overall symptom severity significantly improved (p<0.05) during treatment when compared to the baseline week. Nausea significantly decreased on day 5 (p<0.01) of treatment. Episodes of vomiting did not significantly change. Side effects included pruritus (2 patients) and redness (1) at the patch site, headache (1), constipation (1), and poor patch adherence (5). Conclusions & Inferences: GTS significantly reduced nausea severity in patients with gastroparesis. There were also significant improvements in early satiety, postprandial fullness, and abdominal pain. Nausea improvement occurred on the fifth day of treatment. Thus, GTS has therapeutic effect on nausea, as well as other gastroparesis symptoms, in patients with gastroparesis as captured using a daily diary for gastroparesis.