Anti-infectives & Renal Function Cheat Sheet

Eight anti-infectives. Eight thresholds. And two different measures of kidney function — which is where most of the errors happen.

This free one-page reference pulls together the renal dosing information you actually need at the clinical check, in a format you can print and pin up. Every threshold is tagged so you know at a glance whether it comes from the BNF, MHRA and NICE (eGFR) or from the Summary of Product Characteristics (CrCl, calculated with Cockcroft–Gault).

What's covered

• Nitrofurantoin, trimethoprim, co-amoxiclav, ciprofloxacin, aciclovir, clarithromycin, amoxicillin and fluconazole

• The exact cut-off for each, and whether it's eGFR or creatinine clearance

• The dose adjustment at each band, written the way you'd apply it

• The key risk behind each threshold — hyperkalaemia, crystal nephropathy, convulsions, QT prolongation, MHRA fluoroquinolone restrictions

• The anti-infectives that need no renal adjustment at all, and why flucloxacillin is such a common exam distractor