A prophylactic is something that is used to prevent a disease or condition.


    A prophylactic is used to prevent something from happening. Usually, prophylactics are agents that can prevent a disease state or condition from developing. For example, a dentist might prescribe a prophylactic course of antibiotics to a patient who has undergone an extraction to prevent a dry socket from forming, and prophylactic treatment via medication is often used to prevent migraines.