Epinephrine

Dogs: 0.05–0.5 mg, intratracheally or IV

Cats: 0.1 mg, IV or IM

Large animals: 0.1 mg/kg, IV, SC, or IM

Isoproterenol

Dogs: 0.1–0.2 mg, IM or SC, q 6 h

Cats: 4–6 mcg, IM, every 30 minutes as needed

Horses: 0.4 mcg/kg, IV (diluted)

Terbutaline

Dogs, cats: 0.1 mg/kg, SC, every 4 hours, or 0.03 mg/kg, PO, q 8 h

Horses: 0.0033 mg/kg, IV, or 0.2–0.6 mg/kg, PO, q 12 h

Albuterol

Dogs: 0.05 mg/kg, PO, q 8 h

Horses: 8 mcg/kg, PO, q 12 h

Clenbuterol

Horses: 0.8–3.2 mcg/kg, PO, q 12 h