Lannett ( LCI) has started marketing Sulfamethoxazole with Trimethoprim tablets.The Philadelphia-based maker of generic drugs said the product comes in single- and double-strength formulations and is used to treat infections. Lannett said the medication is generic equivalent of Bactrim. According to NDC Health, sales for the generic Sulfamethoxazole with Trimethoprim tablets totaled $260 million in 2004, Lannett said. It said the drug is used to treat infections such as urinary tract infections, bronchitis, ear infections (otitis), traveler's diarrhea, and Pneumocystis carinii Pneumonia. On Wednesday, Lannett rose 34 cents to $4.58.