Article Text


Poor rectal absorption of trimethoprim/sulphamethoxazole in treating Pneumocystis carinii pneumonia.
  1. R. T. Dorr,
  2. J. R. Powell,
  3. M. Heick,
  4. D. W. Barry


    A 24-year-old female with Hodgkin's disease and Pneumocystis carinii pneumonia was tested with trimethoprim/sulphamethoxazole (TMP/SMX) tablets. Because treatment failure was feared owing to chronic emesis potentially resulting in incomplete drug absorption, the same TMP/SMX dose was administered by rectal suppositories after the 5th day of oral dosing. The relative fractions (rectal/oral) or the suppository dose absorbed for TMP and SMX were 3.0% and 19.5% respectively. When TMP/SMX treatment is required and the oral route is not practical, the investigational i.v. preparation should be obtained.

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