CW Continuous Wormer (pyrantel tartrate) is to be administered on a continuous basis as a top dress on the horse's daily ration. Feed at the rate of 1.2 mg pyrantel tartrate per pound of body weight per day. To achieve this dose administer 0.5 ounces of CW Continuous Wormer per 250 lb of body weight. CW Continuous Wormer should be administered for the entire period that the animal is at risk to internal parasites. Unprotected animals that have grazed may already have an established S. vulgaris larval infestation. Before administering CW Continuous Wormer, these animals should be treated with a therapeutic dose of a larvicidal product. Foals may be fed CW Continuous Wormer at such time when consistent intake of grain mix is occurring. This is generally between two and three months of age. CW Continuous Wormer may be used in mares at any stage of pregnancy or lactation. Stallion fertility is not affected by the use of CW Continuous Wormer.