09/09/2026
💊 He was taking painkillers for recurring neck and shoulder pain. His kidney function told us something else.
A 38-year-old man had been frequently taking OTC NSAID painkillers for nearly 6 months for recurring neck pain and headaches. He felt completely fine—no swelling, urinary complaints, or obvious symptoms of kidney disease.
A routine health check, however, showed creatinine 1.7 mg/dL with a reduced eGFR, despite previously normal kidney function.
🔬 So, what could be happening inside the kidneys?
NSAIDs reduce the production of prostaglandins, which help maintain blood flow to the kidneys by keeping the afferent arteriole dilated.
↓ Prostaglandins → Afferent arteriole constriction → ↓ Blood flow to the glomerulus → ↓ GFR → ↑ Creatinine
In susceptible individuals, this reduced kidney perfusion can contribute to acute kidney injury (AKI). Repeated or prolonged exposure may also increase the risk of chronic kidney damage.
⚠️ The tricky part?
Early kidney dysfunction can be silent. You may have no kidney pain, swelling, or noticeable urinary symptoms.
Sometimes, the first clue is simply an unexpected rise in creatinine or fall in eGFR on a routine blood test.
💡 What many people miss:
OTC does not mean risk-free. The risk is greater with frequent NSAID use, especially with dehydration, older age, existing kidney/heart disease, or certain medications.
📌 The takeaway?
If you regularly need painkillers for recurring pain, don't just keep masking the symptom. Find out why the pain keeps coming back.
Sometimes, your blood reports can raise an alarm before your body does.
Note: This post is for general awareness and education only and is not intended as individual medical advice or treatment. Please consult your doctor before making changes to your medications.
KidneyFunction AcuteKidneyInjury BloodTests Pathology PreventiveHealth
