The following adverse reactions have been reported after use of benzydamine hydrochloride in solution form: Local Adverse Reaction: The most commonly reported reaction is oral numbness. Occasional burning or stinging sensation may occur. Other local adverse effects were less common and included dryness or thirst, tingling, warm feeling in mouth and altered sense of taste.
Systemic Adverse Reactions: These were uncommon and consisted mainly of nausea, vomiting, retching, gastrointestinal disorders, dizziness, headache and drowsiness.
Hypersensitivity reactions occur very rarely but may be associated with pruritus, rash, urticaria, photodermatitis and occasionally laryngospasm or bronchospasm.
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