Drug Dosing in Kidney Diseases Flashcards
Best marker in AKI setting?
Urine output, SCR lags behind GFR changes by 1 -2 days
When do we dose change?
Narrow TI
Fraction excreted unchanged in using is > 30%
Metabolites are active
Major PKPD effects to be considered
Increased BBB permeability and thus greater CNS effects
Less platelet aggregation, more bleed risk
Green opioids
Fentanyl, methadone
Yellow opioids
Hydromorphone, oxycodone, hydrocodone
Red opioids
Morphine, codeine, meleridine
Loading dose E
Ld concentration = change in Cpx Vd
Antimicrobial agents with NO dose adjustments
Azithromycin Ceftriaxone Clindamycin Doxycycline Linezolid Metronidazole Moxidloxacin
Phenytoin goals
Total
Free
10 - 20 mcg/ml
1 - 2 mcg/ml
CrCl > 20ml phenytoin corrected eq
Measured / ((0.275 x albumin) +0.1)
Crcl < 20ml/min for correct phenytonin
Measured / ((0.2 x albumin) +0.1)