A Zole 400mg Tablet is an antibiotic medicine that helps treat many parasitic worm infections. It works by killing and stopping the further growth of parasites causing the infection. This medicine usually makes you feel better quite quickly. However, you should continue taking it as long as it is prescribed even when you feel better, to make sure that all parasites are killed and do not become resistant. This medicine is generally safe to use while pregnant or breastfeeding, but you should ask your doctor.