trimethoprim(redirected from Protrin DF)
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An antibiotic drug, C14H18N4O3, used primarily to treat or prevent urinary tract infections, often in combination with sulfamethoxazole.
(Pharmacology) an antibiotic often prescribed to be taken with a sulphonamide, esp to treat urinary infections
tri•meth•o•prim(traɪˈmɛθ ə prɪm)
a synthetic crystalline compound, C11H18N4O3, usu. combined with a sulfonamide as an antibiotic preparation in the treatment of urinary tract infections and pneumocystis pneumonia.
[1960–65; trimetho(xyphenyl) + p(y)rim(idinediamine), components of its chemical name]