TABLE 08: Drugs with Approved Activity Against Intestinal Helminths of Dogs and Cats* Close this PagePrint This Page
Drug/Drug CombinationDogCat
Dichlorophene200 mg/kg, PO (UK) 220 mg/kg, PO (USA)200 mg/kg, PO (UK)
Dichlorvos27-33 mg/kg, PO for adults (extra-label) 11 mg/kg, PO for all ages (USA)11 mg/kg, PO (USA)
Diethylcarbamazine citrate55-110 mg/kg, PO; repeat 10-20 days later (USA, CAN)55-110 mg/kg, PO; repeat 10-20 days later (CAN)
Diethylcarbamazine citrate + oxibendazole (daily HW)6.6 mg/kg + 5 mg/kg, respectively, PO (USA) 
Epsiprantel5.5 mg/kg, PO (USA, CAN)2.75 mg/kg, PO (USA, CAN)
Fenbendazole50 mg/kg, PO, sid for 3 days (USA, CAN, UK) 100 mg/kg, PO for adults (UK)50 mg/kg, PO, sid for 3 days (UK) 100 mg/kg, PO for adults (UK)
Flubendazole22 mg/kg, PO, sid for 2 days for roundworms and hookworms; sid for 3 days for Trichuris vulpis and Taenia pisiformis (UK)22 mg/kg, PO, sid for 2 days for roundworms and hookworms; sid for 3 days for Taenia taeniaeformis (UK)
Ivermectin (monthly HW) 0.024 mg/kg (USA, CAN)
Ivermectin + pyrantel (monthly HW)0.006 mg/kg + 5 mg/kg, respectively, PO (USA, CAN) 
Mebendazole50-200 mg total, PO, bid for 2-5 days; depends on age and weight (UK)50-200 mg total, PO, bid for 2-5 days; depends on age and weight (UK)
Milbemycin oxime (monthly HW + therapy)0.5 mg/kg, PO (USA, CAN, UK)2.0 mg/kg, PO (USA, CAN)
Milbemycin oxime + lufenuron (monthly HW)0.5 mg/kg + 10 mg/kg, respectively, PO (USA, CAN, UK) 
Moxidectin0.17 mg/kg, SC; 6-mo HW injectable (USA, CAN) 
Nitroscanate50 mg/kg, PO (CAN, UK) 
Piperazine55-62 mg/kg, PO for roundworms, re-treat 10 days after first treatment (USA, CAN); 80-100 mg piperazine hydrate/kg, PO for roundworms (UK); 120-240 mg piperazine hydrate/kg, PO for hookworms (UK)55-62 mg/kg, PO for roundworms, re-treat 10 days after first treatment (USA, CAN); 80-100 mg piperazine hydrate/kg, PO for roundworms (UK); 120-240 mg piperazine hydrate/kg, PO for hookworms (UK)
PraziquantelFollow label dose PO, SC, IM (USA, CAN) 5 mg/kg, PO (UK) 5.68 mg/kg, SC, IM (UK)Follow label dose PO, SC, IM (USA, CAN) 5 mg/kg, PO (UK) 5.68 mg/kg, SC, IM (UK) Follow label dose for topical formulation (UK)
Praziquantel + pyrantel Follow label dose, PO (USA, CAN, UK)
Praziquantel + pyrantel + febantelFollow label dose, PO (USA, CAN, UK) 
Pyrantel5 mg/kg, PO for dogs >2.3 kg (USA) 10 mg/kg, PO for dogs <2.3 kg (USA) 5 mg/kg, PO for all weights (USA, CAN, UK)20 mg/kg, PO; repeat 7-10 days later (CAN) 5-10 mg/kg, PO; repeat 2 wk later (extra-label)
Pyrantel + febantel14.4 mg/kg + 15 mg/kg, respectively, PO (UK) 
Pyrantel + oxantel5 mg/kg + 20 mg/kg, respectively, PO (CAN) 
Selamectin (monthly HW + therapy)6 mg/kg, topical (CAN, UK)6 mg/kg, topical (USA, CAN, UK)
*See text for specific approvals; (USA) = approved in the USA; (UK) = approved in the UK; (CAN) = approved in Canada; HW = heartworm prevention.