Variables
Description
What is this formula?
The Creatinine Clearance Adjusted Dose estimates a modified drug dose based on the patient's renal function. It is commonly used for drugs primarily eliminated by the kidneys.
When to use it
Use this formula when adjusting medication regimens in patients with impaired renal function to reduce the risk of drug accumulation and toxicity.
Example
Data:
Dstd = 500 mg
CrClp = 40 mL/min
CrCln = 100 mL/min
Formula:
Dadj = Dstd × (CrClp / CrCln)
Substitution:
Dadj = 500 × (40 / 100)
Result:
Dadj = 200 mg
Applications
- Renal dose adjustment
- Antibiotic therapy
- Nephrology practice
- Clinical pharmacokinetics
- Drug safety management
Note
This formula provides a simplified estimate of renal dose adjustment. Many drugs require manufacturer-specific dosing recommendations that may use nonlinear adjustments, interval changes, or additional patient factors. The result should be considered an initial approximation rather than a definitive prescription.