Published online by Cambridge University Press: 13 June 2014
Levels of immunoglobulins were measured in 32 schizophrenic patients with tardive dyskinesia and 34 schizophrenic patients without tardive dyskinesia. The duration of neuroleptic treatment in years was similar in the two groups. The serum immunoglobulin concentrations (mg%) were found to be significantly different in the two groups; IGA and IGM levels were higher in patients with tardive dyskinesia. The present results may be explained on the basis of dysfunction of the immunological system in tardive dyskinesia.