Antiprotozoals are a type of medication used to treat infections caused by protozoa, which are tiny, single-celled organisms. These infections can lead to diseases such as malaria, amoebic dysentery, and giardiasis. Antiprotozoals work by targeting the life cycle of the protozoa, disrupting their ability to grow and reproduce, which helps the body eliminate the infection. There are several classes of antiprotozoals, each effective against different types of protozoan infections. Some common examples include metronidazole, used for giardiasis and amoebic dysentery, and quinine, which is often used to treat malaria. Proper diagnosis and treatment are essential for effectively managing these infections.