// multi-utility computation suite · offline · instant · precise
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health.renal-drug-dosing Calculator
Adjusts drug dose or interval for renal impairment using the percentage GFR reduction method (dose reduction factor = actual GFR / normal GFR). Renal dose adjustment is required for any drug >30% eliminated unchanged by the kidney — failure to adjust causes drug accumulation and toxicity.
Inputs
Normal Dose Mg
Amount of medication administered per period. Most dosing is weight-based — verify with a licensed prescriber before clinical use.
Normal Gfr Ml Min
Reference formula or conversion factor shown for context.
Patient Gfr Ml Min
Reference formula or conversion factor shown for context.
Fraction Renally Excreted Pct
Reference formula or conversion factor shown for context.
Results
dose reduction factor DRF
A dimensionless multiplier applied in the calculation.
adjusted dose (mg)
Reference formula or conversion factor shown for context.
GFR ratio (patient/normal)
The proportional relationship between two quantities.
DRF = 1/(fe(1/Q - 1) + 1)
Reference formula or conversion factor shown for context.