Probiotics in the Reduction of Antibiotic Associated Diarrhea

Inclusion Criteria: * Admitted to Good Samaritan Hospital * Placed on pneumonia order set * Age 18+ Exclusion Criteria: * Patient with inadequate coherency to understand consent * Active Diarrhea at admission * Non-controlled intestinal disease * Documented positive C. difficile infection within the 3 months before enrollment * Antibiotic use at hospital admission * Immunosuppressive therapy * Pregnancy * Allergic to ingredients in Florajen-3 * Allergic to ingredients in placebo * Immunocompromised state including: * HIV with a low CD4 count * Active malignancy receiving chemotherapy * Medications including long-term steroids (\>2 weeks), and disease modifying biologic agents * Acquired immune deficiency * Unable to take oral medication * Less than 4 doses of probiotic or placebo * Taking probiotic in the past 30 days