 Single center, open label, historical controlled, phase II study that proposes two courses of standard H. Pylori eradication antibiotic therapy can suppress carcinogenesis and improve the long-term outcomes of patients with PMP. The first course of antibiotics PrevPac will be administered before cytoreductive surgery and HIPEC and the second course afterwards. The historical control group will consist of all PMP patients from Mercy Medical Centers Tumor Registry who did not receive perioperative antibiotic treatment. Long-term statistical outcomes will be calculated using the Kaplan-Meier method and Cox proportional hazard ratio to compare pertinent variable. 80 subjects to be enrolled over 2 years, with a 5 year follow-up period. 