For pain control in nephrolithiasis, which analgesic class is preferred?

For pain control in nephrolithiasis, which analgesic class is preferred?

• A. Acetaminophen
• B. Opioids
• C. NSAIDs
• D. Corticosteroids

Answer: (C)

NSAIDs are preferred for renal colic because they target the underlying mechanism driving the pain. The pain from nephrolithiasis comes from obstruction and ureteral smooth muscle spasm, with prostaglandins amplifying this spasm and increasing renal pelvic pressure. By inhibiting cyclooxygenase, NSAIDs decrease prostaglandin synthesis, which reduces ureteral smooth muscle tone and lowers the pressure built up in the renal pelvis. This provides rapid, effective relief of renal colic that is often superior to acetaminophen or opioids, which relieve pain without addressing the prostaglandin-mediated component. Corticosteroids have inconsistent benefit for this pain in practice. So, for this scenario, NSAIDs are the best initial choice, assuming no contraindications such as significant kidney dysfunction, peptic ulcer disease, or bleeding risk.

NSAIDs are preferred for renal colic because they target the underlying mechanism driving the pain. The pain from nephrolithiasis comes from obstruction and ureteral smooth muscle spasm, with prostaglandins amplifying this spasm and increasing renal pelvic pressure. By inhibiting cyclooxygenase, NSAIDs decrease prostaglandin synthesis, which reduces ureteral smooth muscle tone and lowers the pressure built up in the renal pelvis. This provides rapid, effective relief of renal colic that is often superior to acetaminophen or opioids, which relieve pain without addressing the prostaglandin-mediated component. Corticosteroids have inconsistent benefit for this pain in practice. So, for this scenario, NSAIDs are the best initial choice, assuming no contraindications such as significant kidney dysfunction, peptic ulcer disease, or bleeding risk.