Lithium toxicity is most associated with which complication?

Correct answer: A. Nephrotoxicity / renal impairment (with neurologic toxicity)

• A. Correct. Lithium is cleared by the kidneys and is nephrotoxic; toxicity also causes tremor, ataxia, and seizures. NSAIDs raise lithium levels — a key dental prescribing caution.
• B. Incorrect. Cirrhosis is not a characteristic lithium effect.
• C. Incorrect. Pulmonary fibrosis is linked to other drugs (e.g., amiodarone, bleomycin), not lithium.
• D. Incorrect. Hemolytic anemia is not a typical lithium toxicity.

Note: The source listed 'cardiac/kidney attack' as distractors; renal toxicity is the established answer.