This 10 percent fenben-dazole oral suspension controls lung worms, stomach worms and intestinal worms. Safe-Guard features no milk withholding and is safe for pregnant cows, breeding stock and stressed cattle. Use 2.3 ml per 100 pounds of body weight. For use with Safe-Guard applicator (sold separately). Under conditions of continued exposure to parasites, retreatment may be needed after 4-6 weeks. Do not slaughter within 8 days following last treatment.