Why should NSAIDs be used cautiously in animals with renal disease, and name an alternative analgesic class.

• A. NSAIDs can reduce renal perfusion and worsen nephrotoxicity; consider opioids or local/regional analgesia as alternatives
• B. NSAIDs have no contraindications in renal disease
• C. Hydration cannot influence NSAID safety
• D. NSAIDs should be avoided completely in all pain cases

Answer: (D)

NSAIDs reduce prostaglandin production, and those prostaglandins normally help keep renal blood flow adequate by dilating the afferent arterioles. In animals with renal disease, this protective mechanism is especially important, so blocking it can decrease glomerular filtration, worsen kidney function, and precipitate nephrotoxicity—particularly if the animal is dehydrated, hypotensive, or taking other nephrotoxic drugs. Because of this risk, NSAIDs should be used with caution or avoided in renal disease. An alternative analgesic class to consider is opioids, which provide effective pain relief without the same risk to kidney function; local or regional analgesia can also minimize systemic drug exposure. If an NSAID is considered, ensure adequate hydration, use the lowest effective dose for the shortest duration, and monitor kidney function.