Standard Adult Dosing for Ketorolac (Toradol)
For adult patients, ketorolac should be dosed at 15-30 mg IV/IM every 6 hours (maximum 120 mg/day for patients <65 years, 60 mg/day for patients ≥65 years), with treatment duration not exceeding 5 days combined IV/IM/oral therapy. 1
Route-Specific Dosing
Intravenous (IV) Administration
Single-Dose Regimen:
- Patients <65 years: 30 mg IV bolus over ≥15 seconds
- Patients ≥65 years, renally impaired, or <50 kg: 15 mg IV bolus over ≥15 seconds 1
Multiple-Dose Regimen:
- Patients <65 years: 30 mg IV every 6 hours (maximum 120 mg/day)
- Patients ≥65 years, renally impaired, or <50 kg: 15 mg IV every 6 hours (maximum 60 mg/day) 1
Intramuscular (IM) Administration
Single-Dose Regimen:
- Patients <65 years: 60 mg IM (deep, slow injection)
- Patients ≥65 years, renally impaired, or <50 kg: 30 mg IM 1
Multiple-Dose Regimen:
- Patients <65 years: 30 mg IM every 6 hours (maximum 120 mg/day)
- Patients ≥65 years, renally impaired, or <50 kg: 15 mg IM every 6 hours (maximum 60 mg/day) 1
Oral Administration
Oral ketorolac is ONLY indicated as continuation therapy following IV/IM dosing—never as initial treatment. The typical oral dose is 10 mg every 4-6 hours as needed, but this must be part of the combined 5-day maximum treatment duration. 1
Critical Dosing Considerations
The Analgesic Ceiling Effect
Recent high-quality evidence demonstrates that lower doses of ketorolac (10-15 mg IV) provide equivalent analgesia to higher doses (30 mg IV) with potentially fewer adverse effects. A 2017 randomized controlled trial of 240 ED patients showed no difference in pain reduction at 30 minutes between 10 mg, 15 mg, and 30 mg IV doses (mean difference 0.2-0.3 points on 0-10 scale). 2 A 2023 systematic review confirmed that low-dose ketorolac (10-20 mg) is probably as effective as high-dose (≥30 mg) for acute pain relief. 3
However, the FDA-approved dosing remains 30 mg IV for patients <65 years, and this should guide practice until official labeling changes. 1 The evidence suggests you can safely use lower doses (15 mg IV) if concerned about adverse effects, particularly in vulnerable populations.
Duration Limits Are Absolute
The 5-day maximum duration applies to ALL routes combined (IV + IM + oral). This is non-negotiable due to increased risk of serious gastrointestinal bleeding, renal toxicity, and cardiovascular events with prolonged use. 1 Patients must be transitioned to alternative analgesics before reaching this limit.
Age-Based Dose Reduction
Elderly patients (≥65 years) have prolonged ketorolac half-life (7 hours vs. 5 hours in younger adults) and require 50% dose reduction. 1 This is based on pharmacokinetic data showing decreased clearance without significant changes in peak concentrations. 4
Weight and Renal Function Adjustments
Patients <50 kg (110 lbs) or with any degree of renal impairment require the same dose reduction as elderly patients (15 mg IV every 6 hours, maximum 60 mg/day). 1 Ketorolac clearance is poorly correlated with creatinine clearance in renal disease, and the AUC doubles in renally impaired patients. 1
Common Pitfalls to Avoid
Do not mix ketorolac in a syringe with morphine, meperidine, promethazine, or hydroxyzine—this causes precipitation. 1
Correct hypovolemia before administering ketorolac to minimize renal toxicity risk. 1
Do not exceed 5 days total therapy even if switching between routes—this is when serious adverse events increase substantially.
Recognize that most emergency departments historically overdose ketorolac: A 2017 observational study found 97% of IV doses and 96% of IM doses exceeded the analgesic ceiling dose. 5 While FDA dosing remains the standard, evidence supports that 15 mg IV is equally effective with potentially better safety.
For breakthrough pain, do not increase ketorolac dose or frequency—instead, add low-dose opioids as rescue analgesia if not contraindicated. 1
Onset and Duration of Action
Analgesic effect begins in approximately 30 minutes with maximum effect at 1-2 hours after IV or IM administration. Duration of analgesia is typically 4-6 hours, which aligns with the every-6-hour dosing interval. 1