When used according to instructions side effects would not be expected. However, isolated cases of hypersensitivity to lidocaine hydrochloride have been reported in adults and in a child over 12 years following local injection.
Hypersensitivity presented in these cases as localised oedema with slight difficulty in breathing or as generalised rash.
Chamomile, a minor ingredient in the herbal flavouring agent, has been documented as causing allergic reactions. Hypersensitivity to chamomile normally manifests as breathing difficulties in atopic individuals. Anaphylactic reactions have been reported in individuals drinking herbal tea infusions containing chamomile (herbal tea asthma). Sensitised individuals may demonstrate positive skin reactions to preparations containing chamomile.
In the event of any unwanted side effects, use should be discontinued and a doctor consulted.
Post-marketing Data:
Adverse drug reactions (ADRs) identified during post-marketing experience with Cetylpyridinium/Lidocaine are included in Table 1. The frequencies are provided according to the following convention:
Very common ≥ 1/10
Common ≥ 1/100 and < 1/10
Uncommon ≥ 1/1,000 and <1/100
Rare ≥ 1/10,000, and <1/1,000
Very rare <1/10,000
Not known (cannot be estimated from the available data)
Table 1: Adverse Drug Reactions Identified During Post‐ Marketing Experience with Cetylpyridinium/Lidocaine Frequency Category Estimated from Clinical Trials or Epidemiology Studies |
SOC |
Frequency category | Adverse Event Preferred Term |
Immune System Disorders |
Not known | Hypersensitivity (including Dermatitis) |
General Disorders and Administration Site Conditions |
Not known | Application site reactions (including Erythema) |
Reporting of suspected adverse reactions
Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the Yellow Card Scheme at: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store.