A hemodialysis patient requires an invasive dental procedure. Which drug consideration is most relevant?

Correct answer: C. Heparin is used during dialysis and affects bleeding risk

• A. INCORRECT. Antibiotics are not categorically contraindicated in dialysis patients. Dose adjustments are needed for renally-cleared antibiotics, but they are not universally avoided.
• B. INCORRECT. NSAIDs must be strictly avoided in dialysis/renal failure patients. NSAIDs inhibit prostaglandin-mediated renal vasodilation (critical for residual renal function), cause fluid retention and hypertension, and are nephrotoxic — all of which worsen outcomes in renal patients.
• C. CORRECT. Heparin is administered during every hemodialysis session as an anticoagulant to prevent clotting in the dialysis circuit. Its half-life is approximately 4–6 hours. This residual anticoagulation effect is why dental procedures should be performed the day after dialysis, when heparin has been cleared from the system.
• D. INCORRECT. Acetaminophen is the safest analgesic for dialysis patients at standard doses for acute use. However, chronic high-dose use still carries hepatotoxic risk, and dose adjustments may be needed in some contexts. It is not entirely unrestricted.