DescriptionBayers Drontal Plus Dewormer For Dog - 20 Tablets It is very important to keep a check on your dogs eating habits. Sometimes, they stop eating and sometimes even after eating the nutrition is not properly absorbed by the dog. This may be because of the formation of worms inside a dogs body. Drontal Plus is a prescription medication used to help treat dogs suffering from ringworms, tapeworms, or whipworms. It is usually given in a single dose, and is safe to use on dogs three weeks and older. These tablets can be easily given to dogs and are given as a single dose.