Evaluating the Safety and Efficacy of Tradipitant vs. Placebo in Idiopathic and Diabetic Gastroparesis

Inclusion Criteria: * Diagnosed with gastroparesis * Demonstrated delayed gastric emptying * Presence of moderate to severe nausea * Body Mass Index (BMI) of ≥18 and ≤40 kg/m2 Exclusion Criteria: * Another active disorder or treatment which could explain or contribute to symptoms of gastroparesis * A positive test for drugs of abuse at the screening or evaluation visits; * Exposure to any investigational medication in the past 60 days * Gastrectomy, fundoplication, vagotomy, pyloroplasty, bariatric surgery, or gastric stimulation device surgically implanted within the last year