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Merck Manual
Veterinary Manual
The trusted provider of veterinary information since 1955
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Dosages of Potentiated Sulfonamides

Dosages of Potentiated Sulfonamides

Combination Sulfonamide

Dosage, Route, and Frequency

Trimethoprim/sulfadiazine

15–60 mg/kg/day, PO, IV, or IM

Ormetoprim/sulfadimethoxine

55 mg/kg/day, PO (initial dose; half for subsequent doses)

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Merck & Co., Inc., Kenilworth, NJ, USA is a global healthcare leader working to help the world be well. From developing new therapies that treat and prevent disease to helping people in need, we are committed to improving health and well-being around the world.  The Merck Veterinary Manual was first published in 1955 as a service to the community.  The legacy of this great resource continues as the Merck Veterinary Manual in the US and Canada and the MSD Manual outside of North America.

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