burdock root liquid extract + hyssop liquid extract · Medicine question

What serious allergic reaction has been reported with the burdock root in Covonia Catarrh Relief Formula?

Name: What serious allergic reaction has been reported with the burdock root in Covonia Catarrh Relief Formula?
Published: 2026-11-08T01:40:31.975Z

iatroX medicinesPublished 8 November 2026

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Anaphylactic shock has been reported with the burdock root in Covonia Catarrh Relief Formula, with frequency unknown.

Sources for this answer

Covonia Catarrh Relief Formula / Natures Aid Herbal Catarrh Relief FormulaThornton & Ross Ltd · emc · SmPC §4.8 Undesirable effects · Version 6Document updated 29 August 2017

Sources checked 8 November 2026

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