Antimalarials are medications used to prevent and treat malaria, a disease caused by parasites transmitted through the bites of infected mosquitoes. These drugs work by targeting the life cycle of the malaria parasites, helping to eliminate them from the bloodstream and reduce symptoms such as fever and chills. There are several types of antimalarials, including chloroquine, artemisinin, and mefloquine. Some are used for treatment, while others are prescribed for prevention, especially for travelers visiting areas where malaria is common. Proper use of antimalarials is essential to combat resistance and ensure effective treatment.