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Respiratory, thoracic and mediastinal disorders: Very rare (may affect less than 1 in 10,000): Laryngospasm or bronchospasm.
Gastrointestinal disorders: Uncommon (may affect up to 1 in 1000 but less than 1 in 100 people): Oral numbness and a stinging feeling in the mouth, nausea, vomiting, retching, dryness or thirst, warm feeling in the mouth and alter sense of taste.
The stinging has been reported to disappear upon continuation of the treatment, however if it persists it is recommended that treatment be discontinued.
Skin and subcutaneous tissue disorders: Very rare (may affect less than 1 in 10,000): Hypersensitivity reactions which may be associated with pruritus, urticaria, photosensitivity reaction and rash.
Frequency not known: Angioedema.
Methylparaben may cause allergic reactions (possibly delayed).
Immune system disorders: Frequency not known: Anaphylactic reaction which can be potentially life threatening.
Effects on the kidneys: A 57-year-old woman who had used 400 g of a topical cream containing benzydamine hydrochloride 3% over a period of 4 months was found to have raised plasma concentrations of creatinine and urea consistent with a substantial reduction in glomerular filtration rate.
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