Mebendazole comes as a chewable tablet. It usually is taken twice a day, in the morning and evening, for 3 days or as a single (one-time) dose. You may chew the tablets, swallow them whole, or crush and mix them with food. Treatment may have to be repeated in 2-3 weeks. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take mebendazole exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.