Patent ID: 7067548

Claim:
A method of controlling parasites in or on an animal in need of such control, said method comprising orally administering to said animal a parasiticidally effective, substantially non-emetic amount of a 1-arylpyrazole having the formula (XX): wherein: R 201 is cyano, C(O)alkyl, C(S)NH 2 , alkyl, C(═NOH)NH 2 or C(═NNH 2 )NH 2 ; R 202 is S(O) h R 203 ; R 203 is alkyl or haloalkyl; R 204 is —N(R 205 )C(O)aryl wherein aryl is thienyl or furyl, each of which is unsubstituted or is substituted by alkoxy, haloalkyl or haloaen; R 205 is alkyl, haloalkyl, cycloalkyl, halocycloalkyl, cycloalkylalkyl, halocycloalkylalkyl, alkoxyalkyl, haloalkoxyalkyl, C 3 -C 5 alkenyl, C 3 -C 5 haloalkenyl, C 3 -C 5 alkynyl, or C 3 -C 5 haloalkynyl; X 1 is C—R 212 ; R 211 and R 212 are, independently, halogen, hydrogen, CN or NO 2 ; R 213 is halogen, haloalkyl, haloalkoxy, —S(O) k CF 3 , or —SF 5 ; and h and k are, independently, 0, 1, or 2; or a veterinarily acceptable salt thereof.