Patients with peptic ulcer disease, acid reflux, nausea, and vomiting can all be treated with Rebozen ON tablets. Rabeprazole (20 mg) + Ondansetron (4 mg) Storage The Rebozen ON 4mg/20mg Tablet prevents the body's natural chemicals from causing nausea or other negative symptoms. You feel more relaxed and better after taking this medication. A doctor administers it by injection, and in order to maximize the medication's benefits, you should carefully follow the doctor's recommendations.