Acatak™ Duostar is a pour-on formulation containing the tick development inhibitor fluazuron and the broad spectrum anti-parasitic, ivermectin. Acatak Duostar is used for the strategic control of fluazuron-sensitive cattle tick (Rhipicephalus microplus) on beef cattle. It also treats and controls ivermectin-sensitive internal and external parasites of beef cattle, including gastrointestinal roundworms, lungworm, sucking and biting lice, sarcoptic and chorioptic mites and buffalo fly.