List of products in the National Drug Code with proprietary name . Omadacycline is used to treat a wide variety of bacterial infections. This medication belongs to a class of drugs known as tetracycline antibiotics. It works by stopping the growth of bacteria. This antibiotic treats only bacterial infections. It will not work for viral infections (such as common cold, flu). Using any antibiotic when it is not needed can cause it to not work for future infections.