Intracranial haemorrhage, intracranial venous sinus thrombosis, thrombotic stroke, cerebral ischaemia, transient ischaemic attack, leukoencephalopathy, neurotoxicity, polyneuropathy, peripheral motor neuropathy, dysaesthesia, aphonia, dysphonia, disturbance in attention, ataxia, balance impaired, postural dizziness, burning sensation, cervical root pain, dyskinesia, hyperaesthesia, motor dysfunction, myasthenic syndrome, oral paraesthesia, psychomotor hyperactivity, anosmia