Can patients on dialysis take nonsteroidal anti-inflammatory drugs (NSAIDs)?

NSAIDs Should Generally Be Avoided in Dialysis Patients

Patients on dialysis should avoid NSAIDs due to significantly increased cardiovascular risk and mortality, with nonselective NSAIDs being particularly dangerous. While the traditional concern about nephrotoxicity becomes less relevant once patients are dialysis-dependent, the cardiovascular and bleeding risks remain substantial and potentially life-threatening 1.

The Evidence Against NSAID Use in Dialysis

The most recent and highest-quality evidence directly addressing this question comes from a 2021 nationwide population-based case-crossover study that found:

• NSAIDs increased major adverse cardiac and cerebrovascular events (MACCEs) by 37% (adjusted OR 1.37,95% CI 1.26-1.50) 2
• Mortality increased by 29% (adjusted OR 1.29,95% CI 1.22-1.36) 2
• Nonselective NSAIDs drove this risk, while COX-2 selective inhibitors did not significantly increase cardiovascular events 2
• The risk appeared independent of dose and duration, occurring even with short-term exposure 2

This is particularly concerning because dialysis patients already have markedly elevated baseline cardiovascular risk, making the absolute increase in events substantial.

Why the Renal Argument No Longer Applies (But Other Risks Do)

The traditional teaching to avoid NSAIDs in renal disease focused on nephrotoxicity—NSAIDs impair renal prostaglandin-mediated vasodilation, causing acute kidney injury, volume retention, and hypertension 1, 3. However, once patients are dialysis-dependent, the kidney protection argument becomes moot since there is no residual renal function to preserve 4.

Despite this, the guideline evidence is clear: NSAIDs should be avoided in persons with preexisting renal disease to prevent acute renal failure 1. While this was written for pre-dialysis CKD, the cardiovascular and bleeding complications remain highly relevant for dialysis patients.

The Cardiovascular and Bleeding Dangers

Dialysis patients face multiple NSAID-related risks beyond nephrotoxicity:

Cardiovascular Complications

• All NSAIDs can worsen hypertension (mean increase 5 mm Hg), congestive heart failure, and edema 5, 1
• COX-2 inhibitors should be avoided in persons at risk of cardiovascular events 1
• Dialysis patients have inherently high cardiovascular risk, amplifying the absolute risk increase 2

Bleeding Risk

• NSAIDs increase GI bleeding risk 3-6 fold when combined with anticoagulants 1
• Dialysis patients often require anticoagulation for vascular access or cardiovascular disease
• A 2013 study found NSAIDs significantly increased upper GI bleeding risk in dialysis patients (OR 1.15,95% CI 1.07-1.23) 6
• Uremic platelet dysfunction in dialysis patients compounds this bleeding risk

Fluid and Electrolyte Disturbances

• NSAIDs cause sodium retention and volume expansion 5
• This is particularly problematic in dialysis patients with limited ability to excrete excess fluid between treatments

The Pain Management Dilemma

Dialysis patients suffer disproportionately from chronic pain (especially bone-joint pain from renal osteodystrophy), yet have limited safe analgesic options 4, 7. A 2017 study found 35% of hemodialysis patients used NSAIDs regularly (averaging 43 pills/month), primarily for musculoskeletal pain 7. This reflects the inadequacy of alternative pain management strategies.

Safer Alternatives

When dialysis patients require analgesia, follow this hierarchy:

1. Acetaminophen (first-line): Start with the lowest effective dose 5. Note that acetaminophen can also increase blood pressure, though generally less than NSAIDs 8

2. Topical NSAIDs: May provide localized pain relief with minimal systemic absorption (though evidence in dialysis patients is limited)

3. Opioids for short-term use: Despite abuse potential, they have a role for acute pain relief 5. Dose-adjust for dialysis (e.g., avoid morphine due to active metabolite accumulation)

4. Non-pharmacologic approaches: Physical therapy, heat/cold therapy, TENS units

When NSAIDs Might Be Considered (Rare Exceptions)

If NSAIDs are absolutely necessary despite the risks, the following precautions are mandatory:

• Use the lowest effective dose for the shortest duration 5
• Avoid COX-2 inhibitors entirely in dialysis patients given cardiovascular risk 2
• If using nonselective NSAIDs, consider adding a proton pump inhibitor for GI protection 1
• Monitor closely for fluid retention, blood pressure changes, and bleeding
• Avoid in patients with:
  • Recent cardiovascular events (MI, stroke, bypass surgery) 5
  • Congestive heart failure 1
  • Active anticoagulation 1
  • History of GI bleeding 1

Critical Pitfalls to Avoid

• Don't assume NSAIDs are safe just because the patient is already on dialysis—the cardiovascular and bleeding risks persist and may be amplified 2
• Don't use COX-2 inhibitors thinking they're safer—they showed no cardiovascular benefit in dialysis patients 2
• Don't combine NSAIDs with anticoagulants without extreme caution and GI prophylaxis 1
• Don't ignore over-the-counter NSAID use—many patients self-medicate without informing providers 7