Approved and labeled for up to 21 days control against Ostertagia ostertagi - one of the most damaging internal parasites. Delays accumulation of adult worms, subsequently reducing the number of parasite eggs shed onto pasture. No other single product controls a broader spectrum of internal and external parasites, including 36 stages of adult parasites, L4 larvae and inhibited larvae, mange mites and sucking lice. Give cattle 1 ml SQ or IM per 110 lbs. Safe for use in beef cattle, including pregnant cows, newborn calves, bulls, and dairy replacement heifers up to 20 months of age. Give swine 1 ml IM per 75 lbs. | Zoetis DECTOMAX 1% Injectable Solution Cattle and Swine Dewormer | Size 250 mL