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This confusing string of letters stands for "sulfamethoxazole/trimpethoprim, double strength 800 mg-160 mg" and the "teva" refers to the manufacturer. This is an antibiotic preparation of a sulfa antibiotic plus trimethoprim. The brand name is Bactrim or Septra. It is used to treat a wide range of infections, from urinary tract infections to skin infections and certain kinds of pneumonia.
Source(s):
Thirty years of medical practice.
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