Metronidazole, Metronidazole Benzoate Dosage Calculator

Metronidazole Dosage for Dogs, Cats, Horses, Cattle By Weight
Trade Names: Flagyl and generic brands
Functional classification: Antibacterial, antiparasitic

Metronidazole, Metronidazole Benzoate Dosing for Dogs, Cats, Horses, Cattle By Weight

Important Safety Information

Metronidazole benzoate is 62% metronidazole; therefore 20 mg/kg of metronidazole benzoate delivers 12.4 mg/kg metronidazole.

Use with caution and monitor for neurological side effects, especially at higher doses.

Reference Source

Saunders Handbook of VETERINARY DRUGS, Page 551-553

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Standard Dosage Guidelines

Small Animal Dosage

Species Condition Route Dosage Frequency/Duration
Dogs Anaerobes PO 15 mg/kg q12h or 12 mg/kg q8h
Anaerobes IV 15 mg/kg Slow infusion in diluted form
Giardia PO 12-15 mg/kg q12h for 8 days
Cats Anaerobes PO 10-25 mg/kg q24h
Giardia PO 17 mg/kg q24h for 8 days
Giardia (Benzoate) PO 25 mg/kg q12h for 7 days

Large Animal Dosage

Species Condition Route Dosage Frequency/Duration
Horses Anaerobic/Protozoal PO 10 mg/kg q12h
High Dose PO 15-20 mg/kg q6h (increased side effects)
Foals Infections IV/PO 10-15 mg/kg q12h
Cattle Trichomoniasis IV 75 mg/kg q12h for three doses