Learning More About Sulfatrim's Indications

How Does It Work?

Sulfatrim contains two different antibiotics, sulfamethoxazole and trimethoprim. Combining sulfamethoxazole with trimethoprim increases the effectiveness of the drugs and decreases the chance of antibiotic resistance (the development of bacteria with the ability to resist antibiotics).
While trimethoprim does not belong to a specific class of medications, sulfamethoxazole belongs to a group of drugs known as sulfonamides ("sulfa" drugs). These two antibiotics work in different but similar ways. Essentially, both sulfamethoxazole and trimethoprim work by inhibiting the production of folic acid in bacteria, although they work in different stages of folic acid production. Folic acid is important for making proteins and DNA. Because humans obtain folic acid from the diet (and bacteria cannot), human cells are less affected by Sulfatrim.

Sulfatrim Use in Children

Sulfatrim is approved to treat urinary tract infections, ear infections, shigellosis, and Pneumocystis carinii pneumonia in children at least two months old. It is also approved for Pneumocystis carinii pneumonia prevention in children at least two months old. Sulfatrim should never be used in children under two months old. Sulfatrim is especially useful in children because it comes in the form of a cherry-flavored oral suspension (liquid).

Off-Label Uses

On occasion, your healthcare provider may recommend Sulfatrim for something other than the conditions discussed in this article. Sulfatrim is frequently used off-label to treat many other types of infections, particularly if they are caused by bacteria that are susceptible to Sulfatrim. Also, using Sulfatrim to prevent (instead of treat) any type of infection other than Pneumocystis carinii pneumonia is considered an off-label Sulfatrim use. Sulfatrim is sometimes used off-label for the treatment of acne.
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Sulfatrim Antibiotic Information

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