Guaifenesin: rash, including urticaria.
Gastro-intestinal disorders: Bromhexine: nausea, vomiting, diarrhoea, upper abdominal pain.
Guaifenesin: gastrointestinal discomfort, nausea and vomiting have occasionally been reported, particularly in very large doses.
Nervous system disorders: Bromhexine: no available information.
Guaifenesin: dizziness and headache has been reported. Abuse of medications containing guaifenesin may produce urolithiasis.
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