Crystal-induced acute renal failure

Area of Science:

• Nephrology
• Pharmacology
• Toxicology

Background:

• Several medications, including acyclovir, sulfonamides, methotrexate, indinavir, and triamterene, are known to precipitate crystals in urine.
• Intratubular crystal deposition can lead to acute renal insufficiency, particularly in patients with risk factors like dehydration or pre-existing kidney disease.

Purpose of the Study:

• To review the mechanisms of drug-induced crystal nephropathy.
• To outline strategies for preventing and managing acute renal failure caused by drug-induced crystals.

Main Methods:

• Literature review of medications associated with crystal formation.
• Analysis of risk factors contributing to drug-induced intrarenal crystal deposition.
• Discussion of preventative and therapeutic interventions.

Main Results:

• Medications like acyclovir and indinavir can cause crystalluria and acute kidney injury.
• Risk factors such as volume depletion and underlying renal insufficiency exacerbate crystal deposition.
• Preventive measures include appropriate drug dosing, hydration, and urine alkalinization.

Conclusions:

• Acute renal failure from drug-induced crystals is often preventable with proactive management.
• Early recognition and intervention, including drug discontinuation and supportive care, can lead to reversible renal failure.
• Management strategies focus on fluid management, urine pH modification, and avoidance of nephrotoxins.