PrimecTin 0.5% Pour-On is a veterinary product used primarily for the treatment and control of parasites in livestock, particularly cattle. It contains ivermectin as the active ingredient at a concentration of 0.5%. This pour-on formulation is applied topically, typically along the backline of cattle, to control a wide range of internal and external parasites such as gastrointestinal worms, lungworms, lice, and mites.