Ivermectin Dosing for Dogs, Cats, Horses, Cattle, Goats, Sheep, Pigs By Weight
Important Safety Information
Use with caution in Collies and other herding breeds due to potential sensitivity. Monitor for neurological side effects.
For heartworm treatment in dogs: Administer preventative dose for up to 3 months prior to adulticide treatment.
For demodicosis: Successful treatment is confirmed with negative skin scrapings.
Reference Source
Saunders Handbook of VETERINARY DRUGS, Page 447-450
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Standard Dosage Guidelines
Small Animal Dosage
| Species | Condition | Dosage | Frequency | Route |
|---|---|---|---|---|
| Dogs | Heartworm preventative | 6 mcg/kg (0.006 mg/kg) | Every 30 days | PO |
| Microfilaricide | 50 mcg/kg (0.05 mg/kg) | 2 weeks after adulticide therapy | PO | |
| Ectoparasite therapy | 200-400 mcg/kg (0.2-0.4 mg/kg) | Every 7 days | IM, SQ, PO | |
| Demodicosis therapy | 100-600 mcg/kg/day (0.1-0.6 mg/kg) | Daily for 60-120 days | PO | |
| Sarcoptic mange | 200-400 mcg/kg (0.2-0.4 mg/kg) | q7days PO or q14 days SQ for 4-6 weeks | PO, SQ | |
| Cats | Heartworm preventative | 24 mcg/kg (0.024 mg/kg) | Every 30 days | PO |
| Ectoparasite therapy | 200-400 mcg/kg (0.2-0.4 mg/kg) | Every 7 days | IM, SQ, PO | |
| Endoparasite therapy | 200-400 mcg/kg (0.2-0.4 mg/kg) | Weekly | SQ, PO | |
| Ear mites | 0.5 mL per ear (0.1 mg/mL) | As needed | Topical |
Large Animal Dosage
| Species | Dosage | Frequency | Route |
|---|---|---|---|
| Horses | 200 mcg/kg (0.2 mg/kg) | Single dose or as needed | IM, Oral paste, Oral solution |
| Calves | 5.7-13.8 mg/kg | Single dose (duration 135 days) | Oral bolus |
| Cattle & Goats | 200 mcg/kg (0.2 mg/kg) | Single dose | SQ |
| Pigs | 300 mcg/kg (0.3 mg/kg) | Single dose | SQ |
| Sheep | 200 mcg/kg (0.2 mg/kg) | Single dose | SQ, PO |