Praziquantel is used to treat infections caused by Schistosoma worms, which enter the body through skin that has come into contact with contaminated water. Schistosoma worms are found in Africa, South America, Middle Eastern countries, the Caribbean, and parts of Asia.
Praziquantel is also used to treat infection with liver flukes, caused by a type of worm found in East Asia. This worm enters the body while eating contaminated fish.
Praziquantel should not be used to treat parasitic infections in the eye.