If you have a sulfa allergy, you should avoid antibiotics such as Bactrim or Septra (TMP/SMX, trimethoprim-sulfamethoxazole). Trimethoprim-sulfamethoxazole is the most commonly used sulfa antibiotic.

The antibiotic trimethoprim-sulfa (30 mg per kg body weight, Medical Arts Pharmacy, Baltimore, MD) was administered subcutaneously twice daily in 1 ml 0.9% saline. This treatment was continued for ...

Sulfamethoxazole 800mg, trimethoprim 160mg; scored tabs. Sulfamethoxazole inhibits bacterial synthesis of dihydrofolic acid by competing with para-aminobenzoic acid (PABA). Trimethoprim blocks the ...

Sulfamethoxazole 400mg, trimethoprim 80mg; scored tabs. Sulfamethoxazole inhibits bacterial synthesis of dihydrofolic acid by competing with para-aminobenzoic acid (PABA). Trimethoprim blocks the ...