Pharmacology The chief advantage of ketorolac over aspirin is that the former : A Can be combined more safely with an opioid such as codeine. B Does not prolong bleeding time. C Is available in a parenteral formulation that can be used intramuscularly or intravenously. D Is less likely to cause acute renal failure in patients with pre-existing renal impairment. 💡 Explanation The chief advantage of ketorolac over aspirin is that the former : ✓ Correct Answer: C. Is available in a parenteral formulation that can be used intramuscularly or intravenously.