Somnolence, headache, dizziness; diplopia; vomiting, nausea; fatigue. Increased wt; hyponatraemia, agitation, affect lability, confusional state, depression, apathy; ataxia, tremor, nystagmus, amnesia, attention & visual disturbance, blurred vision; vertigo; diarrhoea, abdominal pain, constipation; rash, alopecia, acne; asthenia.