It consists of one part trimethoprim to five parts sulfamethoxazole. It is effective for bacterial infections of the lungs, throat, urinary tract, ear and stomach.Trimethoprim/sulfamethoxazole, (also known as Cotrimoxazole) sold under the brand name Bactrim among others, is a fixed-dose combination antibiotic medication used to treat a variety of bacterial infections. Septran DS 800mg/160mg Tablet works by stopping the growth of the bacteria. Septra ds Septra DS SMZ-TMP Pediatric Sulfatrim Pediatric Canadian Brand Name Apo-Sulfatrim Novo-Trimel Nu-Cotrimox Septa Pediatric Septra Pediatric Suspension DescriptionsSeptra DS Tablet - Uses, Side Effects, and More Generic Name (S): sulfamethoxazole-trimethoprim View Free Coupon Uses This medication is a combination of two antibiotics: sulfamethoxazole.Septran DS 800mg/160mg Tablet is an antibiotic which is used to treat different types of bacterial infections.