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Oral Surgery · single question

In managing oral mucositis (e.g., chemotherapy or radiation-induced), why might a clinician switch from an alcohol-containing chlorhexidine rinse to povidone-iodine?

  1. Alcohol-containing chlorhexidine can irritate already-inflamed, ulcerated mucosa, and MASCC/ISOO guidelines specifically recommend against chlorhexidine for mucositis prevention/treatment; some trial evidence has shown povidone-iodine rinses reduce mucositis severity compared with chlorhexidine
  2. Chlorhexidine has no role in oral care and should never be used for any patient
  3. Povidone-iodine is universally recommended as first-line therapy by every major guideline
  4. There is no meaningful difference between the two agents
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Correct answer: A. Alcohol-containing chlorhexidine can irritate already-inflamed, ulcerated mucosa, and MASCC/ISOO guidelines specifically recommend against chlorhexidine for mucositis prevention/treatment; some trial evidence has shown povidone-iodine rinses reduce mucositis severity compared with chlorhexidine

MASCC/ISOO clinical practice guidelines specifically recommend AGAINST using chlorhexidine mouthwash for the prevention or treatment of oral mucositis, partly because its alcohol content can irritate already-compromised, ulcerated mucosa. Some randomized trials have found povidone-iodine rinses reduce the incidence/severity of radiation-induced mucositis compared with chlorhexidine, though it's worth noting other guideline bodies list both chlorhexidine AND povidone-iodine as 'not recommended' due to limited overall evidence — so this remains an evolving, somewhat mixed evidence area rather than a single universally agreed-upon protocol.

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