Ketorolac Dosing for Pediatric IM Administration
For a 14-year-old female weighing 54.1 kg, the appropriate intramuscular dose of ketorolac is 30 mg as a single dose, not to exceed 120 mg per day, with treatment duration limited to 5 days maximum.
Dosing Rationale
The guideline evidence provides clear weight-based dosing for ketorolac in pediatric patients. According to the American Family Physician migraine management guideline, ketorolac dosing is 60 mg IM every 15 to 30 minutes with a maximal dosage of 120 mg per day, and treatment not to exceed five days 1. However, this represents adult dosing.
For pediatric patients, the most relevant guideline from the European Society for Paediatric Anaesthesiology specifies 0.5-1 mg/kg up to 30 mg for a single intraoperative dose, or 0.15-0.2 mg/kg (max 10 mg) every 6 hours for short-term therapy with a maximum duration of 48 hours 2.
Age and Weight Considerations
At 14 years old and 54.1 kg, this patient falls into the category where adult dosing begins at age 15 years per tuberculosis treatment guidelines 3. However, she should still be dosed based on weight considerations for ketorolac specifically.
Using the weight-based calculation:
- 0.5 mg/kg = 27 mg
- 1 mg/kg = 54.1 mg
Given the maximum single dose cap of 30 mg for pediatric patients 2, and considering recent research showing that doses of 0.9-1 mg/kg significantly increase bleeding risk compared to 0.5 mg/kg 4, the appropriate dose is 30 mg IM as a single dose.
Critical Safety Considerations
- Duration limit: Maximum 5 days of treatment 1
- Daily maximum: 120 mg per day 1
- Bleeding risk: Higher doses (0.9-1 mg/kg) increase primary operative bleeding risk, particularly relevant for procedures like tonsillectomy 4
- Contraindications: Aspirin/NSAID-induced asthma, pregnancy, cerebrovascular hemorrhage 1
Practical Administration
The single 30 mg IM dose provides effective analgesia while minimizing bleeding risk. Recent evidence demonstrates that lower doses (15 mg) provide similar analgesic effects to higher doses (>15 mg) in pediatric emergency department patients 5, suggesting a ceiling effect exists below the traditional maximum dosing.
Monitor for: Edema, drowsiness, dizziness, GI upset, and increased diaphoresis 1. If additional doses are needed, they should be spaced at least 6 hours apart and not exceed the daily maximum of 120 mg.