No, a patient with a GFR of 45 should not receive ketorolac (Toradol), even as a single dose.
Ketorolac is contraindicated in patients with advanced renal impairment or those at risk for renal failure 1. A GFR of 45 mL/min represents moderate renal impairment (CKD Stage 3b), which places this patient in a high-risk category for NSAID-induced acute kidney injury.
Why This Matters
The FDA drug label explicitly states that ketorolac is contraindicated in patients with advanced renal impairment 1. While "advanced" isn't precisely defined in the label, the pharmacokinetic data shows that in patients with renal disease, the area under the curve (AUC) of each ketorolac enantiomer increases by approximately 100% compared to healthy volunteers, and the half-life extends from 5-6 hours to 6-19 hours depending on impairment severity 1. This means drug accumulation and toxicity risk are substantially elevated even with a single dose.
The Evidence Against Use
Multiple case reports document acute renal failure following even single doses of ketorolac in patients with pre-existing renal dysfunction:
- Single-dose toxicity is well-documented: Cases of rapidly appearing acute renal failure have occurred after just one intramuscular dose 2
- Reversible but serious: Six patients developed renal insufficiency with mean serum creatinine rising from 1.2 mg/dL to 2.9 mg/dL, though recovery occurred after discontinuation 3
- Recent surgical data confirms the risk: A 2025 study found that ketorolac in local infiltration analgesia during knee surgery increased acute kidney injury incidence from 2.0% to 12.7% in patients with chronic kidney disease 4
Risk Factors Present
Your patient with GFR 45 likely has multiple compounding risk factors that make NSAID nephrotoxicity more probable:
- Pre-existing renal dysfunction (by definition with GFR 45)
- Potentially older age (common in CKD patients)
- Possible volume depletion or hemodynamic instability if considering pain management
- Reduced renal prostaglandin-mediated compensation for maintaining renal perfusion 5
What to Do Instead
Use alternative analgesics that are safer in renal impairment:
- Opioids without active metabolites: Fentanyl, sufentanil, or methadone are preferred in renal insufficiency 6
- Avoid: Morphine, codeine, meperidine, tramadol, and tapentadol in patients with GFR <30, but use caution even at GFR 45 6
- Use with dose adjustment: Hydrocodone, oxycodone, and hydromorphone can be used with caution and dosage adjustment 6
Common Pitfall
The temptation to use "just one dose" of ketorolac because of its superior analgesic efficacy compared to opioids is dangerous in renal impairment. The risk-benefit calculation does not favor ketorolac when safer alternatives exist, and the consequences of precipitating acute-on-chronic kidney injury can be severe and potentially irreversible.