Giardiasis is a parasitic infection caused by the protozoan Giardia lamblia, which affects the small intestine and can lead to gastrointestinal distress such as diarrhea, abdominal cramps, bloating, and malabsorption.

Praziquantel is a highly effective antiparasitic medication used to treat a range of worm infections, particularly those caused by flatworms and tapeworms.