Fenbendazole Bolus is anti-parasitic formulation which is prescribed for treatment of worms & parasites. Having ivermectin as another ingredient, it is highly effective against wide range of worms including hookworm, tapeworm, whipworm, and giardia. With protein binding ability of about 93%, this medicine is also known to show effectiveness against head lice, scabies, and lymphatic filariasis. It gets metabolized in liver with help of enzyme CYP450 and elimination half-life of about 18 hours. Fenbendazole Bolus works by increasing permeability of parasitic cell membrane resulting in paralysis and then death of parasites.