Aspirin-induced depression of renal function

Area of Science:

• Nephrology
• Pharmacology
• Rheumatology

Background:

• Nonsteroidal anti-inflammatory drugs (NSAIDs), including aspirin, are widely used for their anti-inflammatory properties.
• The impact of therapeutic aspirin doses on renal function requires careful evaluation, particularly in patients with autoimmune conditions.

Observation:

• Patients receiving anti-inflammatory doses of aspirin exhibited elevated serum creatinine and blood urea nitrogen levels.
• A decrease in creatinine clearance was observed in these patients.
• These biochemical changes were more pronounced in patients with systemic lupus erythematosus (SLE).

Findings:

• In 13 of 23 SLE patients, serum creatinine increased by 27-163% and urea nitrogen by 42-270%.
• Creatinine clearance decreased by up to 58% in 11 SLE patients.
• Aspirin-induced renal function alterations were significantly more frequent in SLE patients compared to rheumatoid arthritis patients (P=0.007).
• Patients with active renal disease or hypocomplementemia were more susceptible to these aspirin-induced renal changes.

Implications:

• Aspirin and other NSAIDs can induce significant, reversible renal dysfunction.
• These findings highlight the importance of monitoring kidney function in patients taking NSAIDs, especially those with SLE.
• The potential for aspirin to affect renal function may impact the interpretation of clinical data in relevant patient populations.