Chlorhexidine Side Effects — NDEB AFK MCQ
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Correct answer: E — Extrinsic tooth staining
Extrinsic brown staining of teeth, restorations, and the tongue dorsum is the most common adverse effect of chlorhexidine gluconate mouthwash. This staining results from the interaction of chlorhexidine with dietary chromogens and is surface staining that can be removed by professional prophylaxis. Other side effects include altered taste sensation and (rarely) parotid gland swelling. Despite staining, chlorhexidine remains the gold standard antiplaque/antigingivitis mouthwash.
Reference: Newman – Newman and Carranza's Clinical Periodontology, 13th ed., 2019