PRIMPREX DS 960MG TABLETS Contains Trimethoprim/Sulfamethoxazole (Co-Trimoxazole) Is Used To Treat Certain Bacterial Infections, Such As Pneumonia (A Lung Infection), Bronchitis (Infection Of The Tubes Leading To The Lungs), And Infections Of The Urinary Tract, Ears, And Intestines. It Also Is Used To Treat ‘Travelers’ Diarrhea.