Mebendazole (brand name Vermox® or Pripsen®) is a drug used to combat pinworms, roundworms and hookworms. It is sometimes referred to as "MBZ". Mebendazole (C16H13N3O2) causes slow immobilization and death of the worms by selectively and irreversibly blocking uptake of glucose and other nutrients in susceptible adult intestine where helminths dwell. It is a spindle poison that induces chromosome nondisjunction. Oral dosage is 100 mg 12 hourly for 3 days.