Rimactane is a brand name drug that contains rifampin as its active ingredient. Rifampin is a medication used to treat tuberculosis (TB) and other bacterial infections. Some of the synonyms for Rimactane include Rifadin, Rifamate, Rimactane IV, and Rofact. These medications may have different strengths and dosing instructions, but they all share the same active ingredient. Rifampin works by stopping the growth and spread of bacteria, which helps to improve a patient's symptoms and prevent the spread of infection to others. Your doctor will determine which medication and dosage is best for your condition based on factors such as your medical history, age, and overall health.