Patent ID: 8242161

Claim:
A parasiticidal spot-on formulation for the control of parasite infestations in mammals or birds, which comprises: a) a parasiticidally effective amount of a three-active agent combination consisting of fipronil, amitraz and a third active agent that is a juvenile hormone mimic selected from the group consisting of azadirchtin, diofenolan, fenoxycarb, hydroprene, kinoprene, methoprene, pyriproxyfen, tetrahydroazadirachtin and 4-chloro-2-(2-chloro-2-methylpropyl)-5-(6-iodo-3-pyridylmethoxy)pyridazin-3(2H)-one ; b) a pharmaceutically or veterinarily acceptable spot-on formulation liquid carrier vehicle; and c) optionally, a crystallization inhibitor.