Answer
Propranolol or cimetidine may reduce lidocaine clearance by reducing hepatic blood flow, although these interactions are unlikely to be clinically relevant with topically administered Covonia Sore Throat Menthol Flavour Spray.
Sources for this answer
- Covonia Sore Throat 0.2%/0.05%w/v Oromucosal Spray Menthol FlavourThornton & Ross Ltd · emc · SmPC §4.5 Interaction with other medicinal products · Version 9Document updated
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