Diphenhydramine Hydrochloride Dosing for dogs, Cats, Horses, Cattle, Pigs By Weight
Important Safety Information
For large dogs, equivalent to an oral dose of 25 or 50 mg per dog.
Use with caution and consult veterinary literature for specific cases.
Reference Source
Saunders Handbook of VETERINARY DRUGS, Page 278-280
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Standard Dosage Guidelines
Small Animal Dosage
| Species | Route | Dosage | Frequency |
|---|---|---|---|
| Dogs | PO, IM, SQ | 2.2 mg/kg | q8-12h |
| Cats | PO | 2-4 mg/kg | q6-8h |
| IV, IM | 1 mg/kg | q8h |
Large Animal Dosage
| Species | Route | Dosage | Frequency |
|---|---|---|---|
| Horses | IM | 0.5-1 mg/kg | Single dose as needed |
| Cattle | IM | 0.5-1 mg/kg | Single dose as needed |
| Pigs | IM | 0.5-1 mg/kg | Single dose as needed |