What is the recommended intramuscular (IM) dose of ketorolac (Toradol) for adults, including adjustments for patients aged 65 years or older or with impaired renal function?

Ketorolac IM Dosing

For adults under 65 years with normal renal function, administer ketorolac 60 mg IM as the initial dose, followed by 30 mg IM every 6 hours, not to exceed 120 mg per day and a maximum duration of 5 days 1. However, for patients 65 years or older, those weighing less than 50 kg, or those with impaired renal function, use reduced doses of 30 mg IM initially, followed by 15 mg IM every 6 hours 2.

Standard Adult Dosing (Age <65, Normal Renal Function)

• Initial dose: 60 mg IM
• Maintenance: 30 mg IM every 6 hours
• Maximum daily dose: 120 mg (after first day; first day can be up to 150 mg)
• Maximum duration: 5 days 1, 2

Reduced Dosing for High-Risk Patients

Use lower doses (30 mg IM initial, then 15 mg IM every 6 hours) for:

• Patients ≥65 years old 2
• Weight <50 kg 2
• Impaired renal function 2
• Chronic kidney disease 3

Critical Considerations for Elderly Patients

The 2019 American Geriatrics Society Beers Criteria strongly recommends avoiding ketorolac and other NSAIDs in older adults due to increased risk of gastrointestinal bleeding, peptic ulcer disease, and acute kidney injury 4. When ketorolac must be used in geriatric patients, the evidence supports that lower doses (15-30 mg) provide equivalent analgesia to higher doses (30-60 mg) with potentially fewer adverse effects 5, 6.

Recent evidence demonstrates that doses as low as 10-20 mg provide comparable pain relief to 30 mg or higher, likely due to an analgesic ceiling effect 6. In elderly ED patients, 15 mg IV or 30 mg IM showed no greater need for rescue analgesia compared to 30 mg IV or 60 mg IM 5.

Absolute Contraindications

Do not administer ketorolac IM to patients with:

• History of peptic ulcer disease 7
• Active gastrointestinal bleeding 1
• Aspirin/NSAID-induced asthma 1
• Cerebrovascular hemorrhage 1
• Pregnancy 1
• Severe renal impairment (consider avoiding entirely) 8

High-Risk Scenarios Requiring Extra Caution

Avoid or use extreme caution in:

• Patients on anticoagulants or antiplatelet agents 4
• Concurrent use of loop diuretics 9
• Multiple comorbidities (≥3) 9
• Postoperative patients with third-spacing/volume depletion 8
• Concurrent nephrotoxic medications 9

Renal Safety Concerns

The addition of ketorolac in patients with pre-existing chronic kidney disease significantly increases AKI risk (12.7% vs 2.0%, p=0.041), while patients with normal renal function show no elevated risk 3. In geriatric trauma patients receiving IV ketorolac, the overall AKI incidence was only 2.5%, but risk increased substantially with loop diuretic use and multiple comorbidities 9.

Monitor urine output and renal function parameters closely in all patients receiving ketorolac, particularly those with risk factors 8. The drug is almost entirely renally excreted, necessitating dose adjustment or avoidance in renal insufficiency 8.

Gastrointestinal Risks in the Elderly

Case reports document severe GI complications including perforated gastric ulcers in elderly patients receiving standard doses (30 mg IM) of ketorolac, with two fatalities reported after 13-16 doses 7. Never use ketorolac in patients with a history of gastric ulcer disease 7. Consider prophylactic misoprostol in unavoidable high-risk situations 7.

Practical Dosing Algorithm

1. Age <65, normal renal function, no contraindications: 60 mg IM initial → 30 mg IM q6h
2. Age ≥65 OR weight <50 kg OR mild renal impairment: 30 mg IM initial → 15 mg IM q6h
3. Chronic kidney disease: Avoid ketorolac entirely; choose alternative analgesic 3
4. History of peptic ulcer disease: Absolute contraindication 7
5. All patients: Maximum 5 days duration, monitor renal function 1, 2