What Is Sulfamethoxazole Used For?


Quick Answer

Sulfamethoxazole is an antibiotic that is primarily used to treat malaria, chlamydial pink eye, toxoplasmosis and urinary tract infections. Its single use has been discontinued because of bacterial resistance; instead it is combined with trimethoprim in the medications Bactrim and Septra to treat infections, according to MedicineNet.

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Full Answer

The side effects of sulfamethoxazole include dizziness, headaches, diarrhea, nausea, vomiting, increased sun sensitivity and the development of a rash. Even though the effects of sulfamethoxazole on pregnancy have not been adequately studied, pregnant women should consult with their physicians before taking this antibiotic. Women who are nursing should avoid using sulfamethoxazole because it is deposited in breast milk, explains MedicineNet.

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