<s>[INST] Given an abstract text, please determine whether it contains any drug mentions. Provide a 'Yes' or 'No' answer based on the presence or absence of drugs. Abstract Text: Peri-Treatment Antibiotics Improve Survival Of Patients With Metastatic Pancreatic Adenocarcinoma Treated With First-Line Gemcitabine-Based Chemotherapy: A Seer-Medicare Study[/INST] Yes</s>