<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing persistent vomiting for the past few days and I have no idea what is causing it.  <response>: It seems like you may have a case of persistent vomiting of unknown cause. I am going to prescribe you medication to help alleviate the symptoms: Ondansetron Zofran, Promethazine, Metoclopramide, Droperidol, Diphenoxylate Lomotil, Mefenamic Acid, Potassium Bicarbonate, Ioversol, Clindamycin Topical Product, and Zidovudine. 