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Drug
Dosage
Codeine
Dogs: 1–2 mg/kg, PO, bid-qid
Hydrocodone
Dogs: 0.25 mg/kg, PO, bid-qid
Butorphanol
Dogs: 0.055–0.11 mg/kg, SC, bid-qid, or 0.55–1.1 mg/kg, PO, bid-qid
Cats: 0.1–0.4 mg/kg, SC, bid-qid