Which drug classes require the most frequent renal dose adjustment?

Aminoglycosides, carbapenems, most cephalosporins, antivirals (acyclovir, ganciclovir), direct oral anticoagulants (dabigatran, rivaroxaban, apixaban), and anticonvulsants (gabapentin, pregabalin) require close monitoring in CKD.

Should actual or ideal body weight be used for Cockcroft-Gault in renal dosing?

Use actual body weight if below IBW; use IBW if obese (BMI >30); for morbid obesity use adjusted BW = IBW + 0.4(ABW-IBW); use adjusted body weight for most renally cleared drugs.

How does the CKD-EPI equation differ from Cockcroft-Gault for drug dosing?

CKD-EPI estimates GFR (eGFR) normalized to 1.73m² BSA; Cockcroft-Gault estimates absolute CrCl; FDA drug labeling uses CrCl (Cockcroft-Gault) for dosing recommendations; the two values are often similar but can differ significantly.

What is the augmented renal clearance phenomenon?

In critically ill patients with hyperdynamic sepsis, CrCl can exceed 130-180 mL/min (ARC); standard renally cleared drug doses may be inadequate; consider higher doses of renally cleared antibiotics in young trauma or sepsis patients.

How should renal dosing change on dialysis?

ESRD on HD: dosing depends on dialyzability; hydrophilic, low protein-binding, small molecules (metformin, lithium, aminoglycosides) are well-dialyzed; highly protein-bound or lipophilic drugs are not significantly cleared.

Renal Dose Adjustment Calculator for 25+ Drugs

Adjusts doses for 25+ commonly renally cleared medications including carbapenems, beta-lactams, antivirals (acyclovir, valacyclovir), gabapentin, pregabalin, and allopurinol based on CrCl using Cockcroft-Gault equation.

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Renal Dose Adjustment Calculator for 25+ Drugs

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Frequently Asked Questions

Which drug classes require the most frequent renal dose adjustment?

Should actual or ideal body weight be used for Cockcroft-Gault in renal dosing?

How does the CKD-EPI equation differ from Cockcroft-Gault for drug dosing?

What is the augmented renal clearance phenomenon?

How should renal dosing change on dialysis?