Serum/plasma concentration of ketorolac (a nonsteroidal anti-inflammatory drug)

Why This Test Is Done

Your doctor may order this test if you’re taking ketorolac for pain relief and want to ensure it’s providing the right amount of benefit without causing harmful side effects. It’s also used in cases where the drug’s effects aren’t clear or if you’re experiencing unusual symptoms while on the medication.

What to Expect Before the Test

No special preparation is needed for this test. You’ll have a small needle inserted into your arm or vein to draw blood. It usually takes a few minutes, and you may feel a brief pinch or discomfort. If you’re on blood thinners or have a history of bleeding issues, let your doctor know before the test.

What the Results Mean

Results help determine whether your ketorolac levels are therapeutic (effective) or too high/low. High levels may increase the risk of side effects like stomach bleeding or kidney problems, while low levels might mean the drug isn’t working as expected. Your doctor will interpret the results in the context of your medical history and symptoms.

Common Side Effects to Watch For

While ketorolac is generally safe when used as prescribed, side effects can include stomach pain, nausea, or increased bleeding risk. If you notice unusual bruising, bleeding gums, or signs of kidney issues (like changes in urine output), contact your doctor immediately.