chlorhexidine dihydrochloride + lidocaine hydrochloride · Medicine question

Can prolonged, continuous use of Covonia Medicated Sore Throat Lemon lozenges cause tooth discolouration?

Name: Can prolonged, continuous use of Covonia Medicated Sore Throat Lemon lozenges cause tooth discolouration?
Published: 2026-11-08T01:42:42.239Z

iatroX medicinesPublished 8 November 2026

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Prolonged, continuous use of Covonia Medicated Sore Throat Lemon lozenges can cause removable brown tooth discolouration due to chlorhexidine.

Sources for this answer

Covonia Medicated Sore Throat 5mg/1mg Lozenges Lemon FlavourThornton & Ross Ltd · emc · SmPC §4.8 Undesirable effects · Version 5Document updated 15 August 2025

Sources checked 8 November 2026

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