The product may cause drowsiness, which may progress to deep sleep, headache, dizziness, psychomotor impairment, inability to concentrate, lassitude, irritability and antimuscarinic effects such as urinary retention, dry mouth and blurred vision. Gastrointestinal disturbances may occur including abdominal pain, dyspepsia and anorexia. Paradoxical CNS stimulation may occur especially in children or after high doses. Skin rashes including exfoliative dermatitis and photosensitivity reactions and hypersensitivity reactions including urticaria may occur. Other side effects include convulsions, sweating, myalgia, paraesthesia, tinnitus, palpitations, tachycardia, arrhythmias, chest pain, haemolytic anaemia and other blood dyscrasias, extrapyramidal effects, tremor, liver dysfunction, including hepatitis and jaundice, sleep disturbances, including nightmares, depression, hypotension, hair loss, thickening of bronchial secretions and confusional psychosis in the elderly.