W Ban Suspension is used to treat parasite worm infections like pinworm, whipworm, roundworm, hookworm, and other parasites. It contains Mebendazole, which kills the susceptible helminths (parasitic worms) and treats the infection. It may cause common side effects such as abdominal pain, diarrhoea, not being hungry, gas, and upset stomach. Before taking this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.