trimethoprim sulfa

Can Dogs Take Sulfamethoxazole Trimethoprim? Sulfamethoxazole and Trimethoprim Tablets Double Strength are a broad-spectrum prescription antibiotic that is used in dogs and cats to treat respiratory infections such as bronchitis, urinary tract infections, skin infections, ear infections, gastrointestinal infections, and certain types of diarrhea. What is sulfamethoxazole trimethoprim used for in dogs? Trimethoprim + sulfamethoxazole