Confusional state, irritability, nervousness, hallucination, sedation, agitation, insomnia, abnormal coordination, convulsion, headache, paraesthesia, tremor, blurred vision, tinnitus, palpitations, tachycardia, dry throat, hypotension, chest discomfort, nasal dryness, constipation, diarrhoea, dyspepsia, nausea, vomiting, rash, pruritus, urticaria, urinary retention.