Nayzan Bolus is a broad spectrum anthelmintic for treatment and control of Gastrointestinal, pulmonary Nayzan Bolus is a broad spectrum anthelmintic for treatment and control of Gastrointestinal, pulmonary nematode and adult liver fluke infections in Cattle and sheep only. It removes Lung worms, Gastrointestinal worms and Fasciola (flukes) from cattle, sheep and goats. Nayzan Bolus is a broad spectrum formula for the complete eradication of all the type of flukes, round worms, tape worms segments, lung worms, ostertagia, nematodirus and all other likely worms. Absolute control on Husk and Hoose diseases in animals.