Trimethoprim Renal Dose Adjustment Calculator

Calculate trimethoprim (TMP and TMP-SMX) dose adjustment for renal impairment, noting that trimethoprim competitively inhibits tubular creatinine secretion, causing apparent creatinine rises without true GFR change.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Calculate trimethoprim (TMP and TMP-SMX) dose adjustment for renal impairment, noting that trimethoprim competitively inhibits tubular creatinine secretion, causing apparent creatinine rises without true GFR change

Each component has a specific meaning:

  • Apparent creatinine rises without true GFR change — The apparent creatinine rises without true gfr change recorded for the scenario being assessed.

Note: Interpret the trimethoprim renal dose result against the thresholds and context described above.

How to Use

Enter the apparent creatinine rises without true GFR change for the scenario you are assessing. Calculate trimethoprim (TMP and TMP-SMX) dose adjustment for renal impairment, noting that trimethoprim competitively inhibits tubular creatinine secretion, causing apparent creatinine rises without true GFR change. Use the trimethoprim renal dose result to inform your calculation.

Frequently Asked Questions