Methenamine Dosage Calculator

Methenamine Dosage for Dogs and Cats By Weight
Trade Names: Methenamine hippurate: Hiprex and Urex; Methenamine mandelate: Mandelamine and generic brands
Functional classification: Antibacterial

Methenamine Dosing for Dogs and Cats By Weight

Important Information

No large animal doses have been reported. It is unlikely to be effective in large animals because their urine is more alkaline.

Reference Source

Saunders Handbook of VETERINARY DRUGS, Page 532-533

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Standard Dosage Guidelines

Small Animal Dosage

Species Formulation Dosage Frequency
Dogs Methenamine hippurate 500 mg/dog q12h PO
Dogs Methenamine mandelate 10-20 mg/kg q8-12h PO
Cats Methenamine hippurate 250 mg/cat q12h PO
Cats Methenamine mandelate 10-20 mg/kg q8-12h PO

Large Animal Dosage

No large animal doses have been reported. It is unlikely to be effective in large animals because their urine is more alkaline.