Hydromorphone Dosing for Dogs, Cats, Horses By Weight
Important Safety Information
Use with caution in animals with respiratory depression, head trauma, or increased intracranial pressure.
Monitor for sedation, respiratory depression, and gastrointestinal effects.
Reference Source
Saunders Handbook of VETERINARY DRUGS, Page 409-411
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Standard Dosage Guidelines
Small Animal Dosage
| Species | Route | Dosage | Frequency |
|---|---|---|---|
| Dogs | IM, SQ | 0.22 mg/kg | q4-6h or as needed |
| IV | 0.1-0.2 mg/kg | q2h or as necessary | |
| Cats | SQ, IM | 0.1-0.2 mg/kg | q2-6h as needed |
| IV | 0.05-0.1 mg/kg | q2-6h as needed | |
| Epidural | 0.05 mg/kg | Epidural (diluted) |
Large Animal Dosage
| Species | Route | Dosage | Frequency |
|---|---|---|---|
| Horses | Epidural | 0.04 mg/kg | Epidural (diluted in 20 mL saline) |
Additional Notes
- For cats: Epidural dose should be diluted in saline to 0.2 mL/kg (1 mL per cat)
- For dogs: 0.1 mg/kg IV may be used with acepromazine as a preoperative sedative
- No systemic doses have been reported for horses