Provides up to 100 to 150 days of parasite control in a single treatment– long enough to break the parasite life cycle and solve the problem of pasture reinfection. IMPORTANT SAFETY INFORMATION: Do not treat within 48 days of slaughter. Not for use in female dairy cattle 20 months of age or older, including dry dairy cows, or in veal calves. Post-injection site damage (e.g. granulomas, necrosis) can occur. These reactions have disappeared without treatment.