Nectol 12 Tablets are used in the treatment of certain worm infections. They are used to treat river blindness and different type of diarrahea. These tablets work by paralyzing and killing the worms or they slow the rate at which adult worm reproduce. The result is less worms in skin,eyes and blood. Nectol 12 Tablets are available only with your doctor's prescription. Take these tablets by mouth on an empty stomach with water.